#
# 2024-11-10T23:08:06.049497
#
# make KBUILD_BUILD_USER=KernelCI LD=riscv64-linux-gnu-ld LLVM_IAS=1 ARCH=riscv LLVM=1 CROSS_COMPILE=riscv64-linux-gnu- CC="ccache clang" O=/tmp/kci/linux/build -C/tmp/kci/linux -j4
#
make: Entering directory '/tmp/kci/linux'
make[1]: Entering directory '/tmp/kci/linux/build'
  SYNC    include/config/auto.conf.cmd
  GEN     Makefile
  GEN     Makefile
  WRAP    arch/riscv/include/generated/uapi/asm/fcntl.h
  WRAP    arch/riscv/include/generated/uapi/asm/errno.h
  WRAP    arch/riscv/include/generated/uapi/asm/ioctl.h
  WRAP    arch/riscv/include/generated/uapi/asm/ioctls.h
  WRAP    arch/riscv/include/generated/uapi/asm/ipcbuf.h
  UPD     include/generated/uapi/linux/version.h
  WRAP    arch/riscv/include/generated/uapi/asm/mman.h
  WRAP    arch/riscv/include/generated/uapi/asm/msgbuf.h
  WRAP    arch/riscv/include/generated/uapi/asm/param.h
  UPD     include/config/kernel.release
  WRAP    arch/riscv/include/generated/uapi/asm/poll.h
  HOSTCC  scripts/dtc/dtc.o
  UPD     include/generated/compile.h
  WRAP    arch/riscv/include/generated/uapi/asm/posix_types.h
  WRAP    arch/riscv/include/generated/uapi/asm/resource.h
  WRAP    arch/riscv/include/generated/uapi/asm/sembuf.h
  HOSTCC  scripts/dtc/flattree.o
  WRAP    arch/riscv/include/generated/uapi/asm/shmbuf.h
  UPD     include/generated/utsrelease.h
  WRAP    arch/riscv/include/generated/uapi/asm/siginfo.h
  WRAP    arch/riscv/include/generated/uapi/asm/signal.h
  WRAP    arch/riscv/include/generated/uapi/asm/socket.h
  HOSTCC  scripts/dtc/fstree.o
  WRAP    arch/riscv/include/generated/uapi/asm/sockios.h
  WRAP    arch/riscv/include/generated/uapi/asm/stat.h
  WRAP    arch/riscv/include/generated/uapi/asm/statfs.h
  WRAP    arch/riscv/include/generated/uapi/asm/swab.h
  WRAP    arch/riscv/include/generated/uapi/asm/termbits.h
  WRAP    arch/riscv/include/generated/uapi/asm/termios.h
  WRAP    arch/riscv/include/generated/uapi/asm/types.h
  SYSHDR  arch/riscv/include/generated/uapi/asm/unistd_32.h
  SYSHDR  arch/riscv/include/generated/uapi/asm/unistd_64.h
  HOSTCC  scripts/dtc/data.o
  HOSTCC  scripts/dtc/livetree.o
  HOSTCC  scripts/dtc/treesource.o
  HOSTCC  scripts/dtc/srcpos.o
  HOSTCC  scripts/dtc/checks.o
  HOSTCC  scripts/dtc/util.o
  LEX     scripts/dtc/dtc-lexer.lex.c
  YACC    scripts/dtc/dtc-parser.tab.[ch]
  HOSTCC  scripts/dtc/libfdt/fdt.o
  HOSTCC  scripts/dtc/libfdt/fdt_ro.o
  HOSTCC  scripts/dtc/libfdt/fdt_wip.o
  HOSTCC  scripts/dtc/libfdt/fdt_sw.o
  HOSTCC  scripts/dtc/libfdt/fdt_rw.o
  HOSTCC  scripts/dtc/libfdt/fdt_strerror.o
  HOSTCC  scripts/dtc/libfdt/fdt_empty_tree.o
  HOSTCC  scripts/dtc/libfdt/fdt_addresses.o
  HOSTCC  scripts/dtc/libfdt/fdt_overlay.o
  HOSTCC  scripts/dtc/fdtoverlay.o
  HOSTCC  scripts/dtc/dtc-lexer.lex.o
  HOSTCC  scripts/dtc/dtc-parser.tab.o
  WRAP    arch/riscv/include/generated/asm/early_ioremap.h
  WRAP    arch/riscv/include/generated/asm/flat.h
  WRAP    arch/riscv/include/generated/asm/kvm_para.h
  WRAP    arch/riscv/include/generated/asm/mmzone.h
  WRAP    arch/riscv/include/generated/asm/parport.h
  WRAP    arch/riscv/include/generated/asm/spinlock.h
  WRAP    arch/riscv/include/generated/asm/spinlock_types.h
  WRAP    arch/riscv/include/generated/asm/qrwlock.h
  WRAP    arch/riscv/include/generated/asm/qrwlock_types.h
  WRAP    arch/riscv/include/generated/asm/user.h
  WRAP    arch/riscv/include/generated/asm/vmlinux.lds.h
  WRAP    arch/riscv/include/generated/asm/device.h
  WRAP    arch/riscv/include/generated/asm/div64.h
  WRAP    arch/riscv/include/generated/asm/dma-mapping.h
  HOSTLD  scripts/dtc/fdtoverlay
  WRAP    arch/riscv/include/generated/asm/dma.h
  WRAP    arch/riscv/include/generated/asm/emergency-restart.h
  WRAP    arch/riscv/include/generated/asm/hardirq.h
  WRAP    arch/riscv/include/generated/asm/hw_irq.h
  WRAP    arch/riscv/include/generated/asm/irq_regs.h
  WRAP    arch/riscv/include/generated/asm/kmap_size.h
  WRAP    arch/riscv/include/generated/asm/local.h
  WRAP    arch/riscv/include/generated/asm/local64.h
  WRAP    arch/riscv/include/generated/asm/msi.h
  WRAP    arch/riscv/include/generated/asm/percpu.h
  WRAP    arch/riscv/include/generated/asm/preempt.h
  WRAP    arch/riscv/include/generated/asm/runtime-const.h
  WRAP    arch/riscv/include/generated/asm/rwonce.h
  WRAP    arch/riscv/include/generated/asm/serial.h
  WRAP    arch/riscv/include/generated/asm/shmparam.h
  WRAP    arch/riscv/include/generated/asm/softirq_stack.h
  WRAP    arch/riscv/include/generated/asm/trace_clock.h
  WRAP    arch/riscv/include/generated/asm/vga.h
  WRAP    arch/riscv/include/generated/asm/video.h
  SYSTBL  arch/riscv/include/generated/asm/syscall_table_32.h
  SYSTBL  arch/riscv/include/generated/asm/syscall_table_64.h
  HOSTLD  scripts/dtc/dtc
  CC      scripts/mod/empty.o
  HOSTCC  scripts/mod/mk_elfconfig
  CC      scripts/mod/devicetable-offsets.s
  UPD     scripts/mod/devicetable-offsets.h
  MKELF   scripts/mod/elfconfig.h
  HOSTCC  scripts/mod/modpost.o
  HOSTCC  scripts/mod/file2alias.o
  HOSTCC  scripts/mod/sumversion.o
  HOSTCC  scripts/mod/symsearch.o
  HOSTLD  scripts/mod/modpost
  CC      kernel/bounds.s
  CHKSHA1 ../include/linux/atomic/atomic-arch-fallback.h
  CHKSHA1 ../include/linux/atomic/atomic-instrumented.h
  UPD     include/generated/timeconst.h
  CHKSHA1 ../include/linux/atomic/atomic-long.h
  UPD     include/generated/bounds.h
  CC      arch/riscv/kernel/asm-offsets.s
In file included from ../arch/riscv/kernel/asm-offsets.c:10:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/asm-offsets.c:10:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/asm-offsets.c:10:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/asm-offsets.c:10:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/asm-offsets.c:10:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/asm-offsets.c:10:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/asm-offsets.c:10:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/asm-offsets.c:10:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/asm-offsets.c:10:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  UPD     include/generated/asm-offsets.h
  CALL    ../scripts/checksyscalls.sh
  HOSTCC  usr/gen_init_cpio
  CC      init/main.o
  CC      arch/riscv/kernel/vendor_extensions/andes.o
  CC      kernel/sched/core.o
  AR      arch/riscv/kernel/vendor_extensions/built-in.a
  AR      arch/riscv/kernel/probes/built-in.a
  AR      arch/riscv/kernel/tests/built-in.a
  GEN     usr/initramfs_data.cpio
  COPY    usr/initramfs_inc_data
  AS      usr/initramfs_data.o
  CC      arch/riscv/kernel/pi/cmdline_early.o
  AR      usr/built-in.a
  UPD     init/utsversion-tmp.h
  CC      init/do_mounts.o
In file included from ../init/main.c:21:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../init/main.c:21:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../init/main.c:21:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../init/main.c:21:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../init/main.c:21:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../init/main.c:21:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../init/main.c:21:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../init/main.c:21:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../init/main.c:21:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      arch/riscv/kernel/pi/fdt_early.o
In file included from ../kernel/sched/core.c:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/sched/core.c:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/sched/core.c:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/sched/core.c:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/sched/core.c:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/sched/core.c:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sched/core.c:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sched/core.c:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sched/core.c:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      arch/riscv/kernel/pi/string.o
  CC      arch/riscv/kernel/pi/ctype.o
In file included from ../init/do_mounts.c:6:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../init/do_mounts.c:6:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../init/do_mounts.c:6:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../init/do_mounts.c:6:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]  CC      arch/riscv/kernel/pi/lib-fdt.o

        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../init/do_mounts.c:6:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../init/do_mounts.c:6:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../init/do_mounts.c:6:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../init/do_mounts.c:6:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../init/do_mounts.c:6:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      arch/riscv/kernel/pi/lib-fdt_ro.o
13 warnings generated.
  CC      init/do_mounts_initrd.o
  CC      arch/riscv/kernel/pi/archrandom_early.o
  OBJCOPY arch/riscv/kernel/pi/cmdline_early.pi.o
  OBJCOPY arch/riscv/kernel/pi/fdt_early.pi.o
  OBJCOPY arch/riscv/kernel/pi/string.pi.o
  OBJCOPY arch/riscv/kernel/pi/ctype.pi.o
  OBJCOPY arch/riscv/kernel/pi/lib-fdt.pi.o
  OBJCOPY arch/riscv/kernel/pi/lib-fdt_ro.pi.o
  OBJCOPY arch/riscv/kernel/pi/archrandom_early.pi.o
13 warnings generated.
  AR      arch/riscv/kernel/pi/built-in.a
  CC      init/initramfs.o
  LDS     arch/riscv/kernel/vmlinux.lds
  AS      arch/riscv/kernel/head.o
In file included from ../init/do_mounts_initrd.c:13:
In file included from ../init/do_mounts.h:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../init/do_mounts_initrd.c:13:
In file included from ../init/do_mounts.h:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../init/do_mounts_initrd.c:13:
In file included from ../init/do_mounts.h:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../init/do_mounts_initrd.c:13:
In file included from ../init/do_mounts.h:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../init/do_mounts_initrd.c:13:
In file included from ../init/do_mounts.h:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../init/do_mounts_initrd.c:13:
In file included from ../init/do_mounts.h:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../init/do_mounts_initrd.c:13:
In file included from ../init/do_mounts.h:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../init/do_mounts_initrd.c:13:
In file included from ../init/do_mounts.h:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../init/do_mounts_initrd.c:13:
In file included from ../init/do_mounts.h:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      arch/riscv/kernel/soc.o
13 warnings generated.
  CC      kernel/sched/fair.o
13 warnings generated.
  CC      arch/riscv/kernel/alternative.o
In file included from ../init/initramfs.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../init/initramfs.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../init/initramfs.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../init/initramfs.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../init/initramfs.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../init/initramfs.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../init/initramfs.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../init/initramfs.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../init/initramfs.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      init/calibrate.o
13 warnings generated.
  CC      arch/riscv/kernel/cpu.o
In file included from ../kernel/sched/fair.c:28:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/sched/fair.c:28:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/sched/fair.c:28:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/sched/fair.c:28:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/sched/fair.c:28:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/sched/fair.c:28:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sched/fair.c:28:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sched/fair.c:28:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sched/fair.c:28:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      arch/riscv/kernel/cpufeature.o
  CC      init/init_task.o
In file included from ../init/init_task.c:2:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../init/init_task.c:2:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../init/init_task.c:2:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../init/init_task.c:2:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../init/init_task.c:2:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../init/init_task.c:2:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../init/init_task.c:2:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../init/init_task.c:2:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../init/init_task.c:2:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AS      arch/riscv/kernel/entry.o
  CC      arch/riscv/kernel/irq.o
13 warnings generated.
  AR      certs/built-in.a
  CC      init/version.o
  CC      mm/filemap.o
  AR      init/built-in.a
  AR      fs/notify/dnotify/built-in.a
  AR      fs/notify/inotify/built-in.a
In file included from ../arch/riscv/kernel/irq.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/irq.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/irq.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/irq.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/irq.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/irq.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/irq.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/irq.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/irq.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      fs/notify/fanotify/built-in.a
  AR      fs/notify/built-in.a
  CC      fs/iomap/trace.o
In file included from ../mm/filemap.c:20:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/filemap.c:20:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/filemap.c:20:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/filemap.c:20:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/filemap.c:20:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/filemap.c:20:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/filemap.c:20:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/filemap.c:20:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/filemap.c:20:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      arch/riscv/kernel/process.o
13 warnings generated.
  CC      kernel/sched/build_policy.o
In file included from ../fs/iomap/trace.c:5:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/iomap/trace.c:5:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/iomap/trace.c:5:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/trace.c:5:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/trace.c:5:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/trace.c:5:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/trace.c:5:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/trace.c:5:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/trace.c:5:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/iomap/iter.o
In file included from ../arch/riscv/kernel/process.c:15:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/process.c:15:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/process.c:15:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/process.c:15:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/process.c:15:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/process.c:15:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/process.c:15:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/process.c:15:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/process.c:15:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/sched/build_policy.c:19:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/sched/build_policy.c:19:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/sched/build_policy.c:19:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/sched/build_policy.c:19:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/sched/build_policy.c:19:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/sched/build_policy.c:19:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sched/build_policy.c:19:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sched/build_policy.c:19:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sched/build_policy.c:19:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      arch/riscv/kernel/ptrace.o
13 warnings generated.
  CC      mm/mempool.o
In file included from ../fs/iomap/iter.c:7:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/iomap/iter.c:7:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/iomap/iter.c:7:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/iter.c:7:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/iter.c:7:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/iter.c:7:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/iter.c:7:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/iter.c:7:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/iter.c:7:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/iomap/buffered-io.o
  CC      arch/riscv/kernel/reset.o
In file included from ../mm/mempool.c:15:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/mempool.c:15:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/mempool.c:15:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/mempool.c:15:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/mempool.c:15:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/mempool.c:15:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/mempool.c:15:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/mempool.c:15:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/mempool.c:15:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      mm/oom_kill.o
  CC      arch/riscv/kernel/return_address.o
In file included from ../fs/iomap/buffered-io.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/iomap/buffered-io.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/iomap/buffered-io.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/buffered-io.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/buffered-io.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/buffered-io.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/buffered-io.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/buffered-io.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/buffered-io.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/return_address.c:9:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/return_address.c:9:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/return_address.c:9:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/return_address.c:9:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/return_address.c:9:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/return_address.c:9:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/return_address.c:9:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/return_address.c:9:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/return_address.c:9:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../mm/oom_kill.c:30:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/oom_kill.c:30:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/oom_kill.c:30:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/oom_kill.c:30:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/oom_kill.c:30:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/oom_kill.c:30:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/oom_kill.c:30:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/oom_kill.c:30:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/oom_kill.c:30:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      arch/riscv/kernel/setup.o
13 warnings generated.
  CC      fs/iomap/direct-io.o
13 warnings generated.
13 warnings generated.
  CC      mm/fadvise.o
  CC      kernel/sched/build_utility.o
In file included from ../arch/riscv/kernel/setup.c:21:
In file included from ../include/linux/efi.h:20:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/setup.c:21:
In file included from ../include/linux/efi.h:20:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/setup.c:21:
In file included from ../include/linux/efi.h:20:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/setup.c:21:
In file included from ../include/linux/efi.h:20:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/setup.c:21:
In file included from ../include/linux/efi.h:20:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/setup.c:21:
In file included from ../include/linux/efi.h:20:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/setup.c:21:
In file included from ../include/linux/efi.h:20:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/setup.c:21:
In file included from ../include/linux/efi.h:20:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/setup.c:21:
In file included from ../include/linux/efi.h:20:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/iomap/direct-io.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/iomap/direct-io.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/iomap/direct-io.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/direct-io.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/direct-io.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/direct-io.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/direct-io.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/direct-io.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/direct-io.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      arch/riscv/kernel/signal.o
In file included from ../mm/fadvise.c:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/fadvise.c:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/fadvise.c:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
In file included from ../kernel/sched/build_utility.c:15:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]

        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
                                                  ^#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)

                                         ~~~~~~~~~~ ^
In file included from In file included from ../kernel/sched/build_utility.c../mm/fadvise.c:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
:        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
15../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
:
In file included from #define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14In file included from ../mm/fadvise.c:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^

        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/sched/build_utility.c:15:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
In file included from ../mm/fadvise.c:15:
In file included from         __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);                                           ~~~~~~~~~~ ^

        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
In file included from #define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
../mm/fadvise.c:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:In file included from ../kernel/sched/build_utility.c:15:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
12        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
:
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.hIn file included from :1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20../kernel/sched/build_utility.c:15:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
:
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:In file included from 136../kernel/sched/build_utility.c:
:../include/asm-generic/io.h15::
778In file included from :../include/linux/sched/isolation.h2::7 :
warning: In file included from performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]../include/linux/tick.h
:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2:        outsw(addr, buffer, count); 
warning:         ^~~~~~~~~~~~~~~~~~~~~~~~~~performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]

../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sched/build_utility.c:15:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.hIn file included from :../mm/fadvise.c778::152:
:In file included from  ../include/linux/pagemap.hwarning: :performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]11
:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
        outsw(addr, buffer, count);In file included from 
./arch/riscv/include/generated/asm/hardirq.h        ^~~~~~~~~~~~~~~~~~~~~~~~~~:
1:
In file included from ../include/asm-generic/hardirq.h../arch/riscv/include/asm/io.h::17119:
:In file included from 55../include/linux/irq.h:: 20note: :
expanded from macro 'outsw'In file included from 
../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sched/build_utility.c:15:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sched/build_utility.c:15:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../mm/fadvise.c:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/iomap/fiemap.o
13 warnings generated.
  CC      mm/maccess.o
In file included from ../arch/riscv/kernel/signal.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/signal.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/signal.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/signal.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/signal.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/signal.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/signal.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/signal.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/signal.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/iomap/fiemap.c:8:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/iomap/fiemap.c:8:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/iomap/fiemap.c:8:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/fiemap.c:8:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/fiemap.c:8:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/fiemap.c:8:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/fiemap.c:8:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/fiemap.c:8:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/fiemap.c:8:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../mm/maccess.c:8:
In file included from ../arch/riscv/include/asm/tlb.h:32:
In file included from ../include/asm-generic/tlb.h:15:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/maccess.c:8:
In file included from ../arch/riscv/include/asm/tlb.h:32:
In file included from ../include/asm-generic/tlb.h:15:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/maccess.c:8:
In file included from ../arch/riscv/include/asm/tlb.h:32:
In file included from ../include/asm-generic/tlb.h:15:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/maccess.c:8:
In file included from ../arch/riscv/include/asm/tlb.h:32:
In file included from ../include/asm-generic/tlb.h:15:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/maccess.c:8:
In file included from ../arch/riscv/include/asm/tlb.h:32:
In file included from ../include/asm-generic/tlb.h:15:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/maccess.c:8:
In file included from ../arch/riscv/include/asm/tlb.h:32:
In file included from ../include/asm-generic/tlb.h:15:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/maccess.c:8:
In file included from ../arch/riscv/include/asm/tlb.h:32:
In file included from ../include/asm-generic/tlb.h:15:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/maccess.c:8:
In file included from ../arch/riscv/include/asm/tlb.h:32:
In file included from ../include/asm-generic/tlb.h:15:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/maccess.c:8:
In file included from ../arch/riscv/include/asm/tlb.h:32:
In file included from ../include/asm-generic/tlb.h:15:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      arch/riscv/kernel/syscall_table.o
13 warnings generated.
  CC      fs/iomap/seek.o
13 warnings generated.
  CC      mm/page-writeback.o
13 warnings generated.
  AR      kernel/sched/built-in.a
  CC      kernel/locking/mutex.o
In file included from ../arch/riscv/kernel/syscall_table.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/syscall_table.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/syscall_table.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/syscall_table.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/syscall_table.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/syscall_table.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/syscall_table.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/syscall_table.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/syscall_table.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/iomap/seek.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/iomap/seek.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/iomap/seek.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/seek.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/seek.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/iomap/seek.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/seek.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/seek.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/iomap/seek.c:9:
In file included from ../include/linux/iomap.h:7:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
13 warnings generated.
  AR      fs/iomap/built-in.a
In file included from ../mm/page-writeback.c:21:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/page-writeback.c:21:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/page-writeback.c:21:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/page-writeback.c:21:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/page-writeback.c:21:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/page-writeback.c:21:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/page-writeback.c:21:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/page-writeback.c:21:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/page-writeback.c:21:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      arch/riscv/kernel/sys_riscv.o
  AR      fs/quota/built-in.a
  CC      fs/proc/nommu.o
In file included from ../kernel/locking/mutex.c:29:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/locking/mutex.c:29:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/locking/mutex.c:29:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/locking/mutex.c:29:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/locking/mutex.c:29:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/locking/mutex.c:29:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/locking/mutex.c:29:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/locking/mutex.c:29:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/locking/mutex.c:29:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/sys_riscv.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/sys_riscv.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/sys_riscv.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/sys_riscv.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/sys_riscv.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/sys_riscv.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/sys_riscv.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/sys_riscv.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/sys_riscv.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/locking/semaphore.o
13 warnings generated.
  CC      mm/folio-compat.o
13 warnings generated.
  CC      arch/riscv/kernel/sys_hwprobe.o
In file included from ../fs/proc/nommu.c:18:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/proc/nommu.c:18:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/proc/nommu.c:18:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/nommu.c:18:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/nommu.c:18:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/nommu.c:18:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/nommu.c:18:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/nommu.c:18:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/nommu.c:18:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/proc/task_nommu.o
In file included from ../kernel/locking/semaphore.c:34:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/locking/semaphore.c:34:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/locking/semaphore.c:34:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/locking/semaphore.c:34:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/locking/semaphore.c:34:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/locking/semaphore.c:34:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/locking/semaphore.c:34:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/locking/semaphore.c:34:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/locking/semaphore.c:34:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../mm/folio-compat.c:7:
In file included from ../include/linux/migrate.h:6:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/folio-compat.c:7:
In file included from ../include/linux/migrate.h:6:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/folio-compat.c:7:
In file included from ../include/linux/migrate.h:6:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/folio-compat.c:7:
In file included from ../include/linux/migrate.h:6:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/folio-compat.c:7:
In file included from ../include/linux/migrate.h:6:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/folio-compat.c:7:
In file included from ../include/linux/migrate.h:6:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/folio-compat.c:7:
In file included from ../include/linux/migrate.h:6:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/folio-compat.c:7:
In file included from ../include/linux/migrate.h:6:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/folio-compat.c:7:
In file included from ../include/linux/migrate.h:6:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
In file included from ../arch/riscv/kernel/sys_hwprobe.c:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h  CC      kernel/locking/rwsem.o
:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/sys_hwprobe.c:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/sys_hwprobe.c:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/sys_hwprobe.c:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/sys_hwprobe.c:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/sys_hwprobe.c:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/sys_hwprobe.c:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/sys_hwprobe.c:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/sys_hwprobe.c:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      mm/readahead.o
  CC      fs/proc/inode.o
13 warnings generated.
  CC      arch/riscv/kernel/time.o
In file included from ../mm/readahead.c:116:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/readahead.c:116:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/readahead.c:116:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/readahead.c:116:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/readahead.c:116:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/readahead.c:116:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/readahead.c:116:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/readahead.c:116:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/readahead.c:116:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      kernel/locking/percpu-rwsem.o
In file included from ../arch/riscv/kernel/time.c:9:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/time.c:9:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/time.c:9:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/time.c:9:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/time.c:9:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/time.c:9:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/time.c:9:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/time.c:9:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/time.c:9:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      arch/riscv/kernel/traps.o
  CC      fs/proc/root.o
13 warnings generated.
  CC      mm/swap.o
  CC      kernel/locking/spinlock.o
In file included from ../arch/riscv/kernel/traps.c:16:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/traps.c:16:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/traps.c:16:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/traps.c:16:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/traps.c:16:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/traps.c:16:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/traps.c:16:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/traps.c:16:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/traps.c:16:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/proc/root.c:19:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/proc/root.c:19:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/proc/root.c:19:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/root.c:19:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/root.c:19:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/root.c:19:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/root.c:19:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/root.c:19:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/root.c:19:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../mm/swap.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/swap.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/swap.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
13 warnings generated.
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/swap.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/swap.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/swap.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/swap.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/swap.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/swap.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      fs/proc/base.o
13 warnings generated.
In file included from ../kernel/locking/spinlock.c:21:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
  CC      arch/riscv/kernel/riscv_ksyms.o
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/locking/spinlock.c:21:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/locking/spinlock.c:21:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/locking/spinlock.c:21:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/locking/spinlock.c:21:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/locking/spinlock.c:21:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/locking/spinlock.c:21:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/locking/spinlock.c:21:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/locking/spinlock.c:21:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/locking/osq_lock.o
13 warnings generated.
  CC      arch/riscv/kernel/stacktrace.o
  CC      mm/truncate.o
  CC      kernel/locking/rtmutex_api.o
In file included from ../fs/proc/base.c:68:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/proc/base.c:68:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/proc/base.c:68:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/base.c:68:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/base.c:68:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/base.c:68:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/base.c:68:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/base.c:68:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/base.c:68:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/stacktrace.c:13:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/stacktrace.c:13:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/stacktrace.c:13:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/stacktrace.c:13:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/stacktrace.c:13:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/stacktrace.c:13:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/stacktrace.c:13:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/stacktrace.c:13:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/stacktrace.c:13:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../mm/truncate.c:12:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/truncate.c:12:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/truncate.c:12:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/truncate.c:12:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/truncate.c:12:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/truncate.c:12:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/truncate.c:12:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/truncate.c:12:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/truncate.c:12:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      arch/riscv/kernel/cacheinfo.o
13 warnings generated.
  CC      fs/proc/generic.o
  CC      kernel/locking/qrwlock.o
13 warnings generated.
  CC      mm/vmscan.o
In file included from ../kernel/locking/qrwlock.c:13:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/locking/qrwlock.c:13:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/locking/qrwlock.c:13:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/locking/qrwlock.c:13:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/locking/qrwlock.c:13:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/locking/qrwlock.c:13:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/locking/qrwlock.c:13:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/locking/qrwlock.c:13:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/locking/qrwlock.c:13:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      arch/riscv/kernel/patch.o
  CC      fs/proc/array.o
13 warnings generated.
  AR      kernel/locking/built-in.a
  CC      kernel/power/qos.o
In file included from ../mm/vmscan.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/vmscan.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/vmscan.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/vmscan.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/vmscan.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/vmscan.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/vmscan.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/vmscan.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/vmscan.c:19:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/proc/array.c:61:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/proc/array.c:61:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/proc/array.c:61:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/array.c:61:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/array.c:61:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/array.c:61:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/array.c:61:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/array.c:61:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/array.c:61:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      arch/riscv/kernel/vendor_extensions.o
  CC      arch/riscv/kernel/traps_misaligned.o
In file included from ../kernel/power/qos.c:40:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/power/qos.c:40:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/power/qos.c:40:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/power/qos.c:40:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/power/qos.c:40:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/power/qos.c:40:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/power/qos.c:40:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/power/qos.c:40:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/power/qos.c:40:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/power/main.o
13 warnings generated.
  CC      fs/proc/fd.o
13 warnings generated.
  CC      mm/shrinker.o
In file included from ../arch/riscv/kernel/traps_misaligned.c:9:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/traps_misaligned.c:9:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/traps_misaligned.c:9:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/traps_misaligned.c:9:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/traps_misaligned.c:9:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/traps_misaligned.c:9:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/traps_misaligned.c:9:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/traps_misaligned.c:9:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/traps_misaligned.c:9:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      arch/riscv/kernel/unaligned_access_speed.o
In file included from ../kernel/power/main.c:17:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/power/main.c:17:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/power/main.c:17:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/power/main.c:17:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/power/main.c:17:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/power/main.c:17:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/power/main.c:17:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/power/main.c:17:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/power/main.c:17:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/proc/fd.c:11:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/proc/fd.c:11:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/proc/fd.c:11:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/fd.c:11:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/fd.c:11:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/fd.c:11:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/fd.c:11:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/fd.c:11:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/shrinker.c:2:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31:In file included from  warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
../fs/proc/fd.c        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
:11:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
In file included from ../include/linux/kernel_stat.h        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
:8:
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]

                                                  ^        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^

In file included from ../mm/shrinker.c:2:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/shrinker.c:2:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/shrinker.c:2:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/shrinker.c:2:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/shrinker.c:2:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/shrinker.c:2:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/shrinker.c:2:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/shrinker.c:2:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
13 warnings generated.
  CC      fs/proc/proc_tty.o
  CC      kernel/power/console.o
13 warnings generated.
  CC      mm/shmem.o
  AS      arch/riscv/kernel/copy-unaligned.o
  AS      arch/riscv/kernel/fpu.o
  CC      arch/riscv/kernel/kernel_mode_fpu.o
In file included from ../fs/proc/proc_tty.c:13:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/proc/proc_tty.c:13:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/proc/proc_tty.c:13:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/proc_tty.c:13:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/proc_tty.c:13:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/proc_tty.c:13:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/proc_tty.c:13:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/proc_tty.c:13:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/proc_tty.c:13:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/power/console.c:9:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/power/console.c:9:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/power/console.c:9:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/power/console.c:9:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/power/console.c:9:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/power/console.c:9:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/power/console.c:9:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/power/console.c:9:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/power/console.c:9:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/proc/cmdline.o
In file included from ../mm/shmem.c:28:
In file included from ../include/linux/ramfs.h:5:
In file included from ../include/linux/fs_parser.h:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/shmem.c:28:
In file included from ../include/linux/ramfs.h:5:
In file included from ../include/linux/fs_parser.h:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/shmem.c:28:
In file included from ../include/linux/ramfs.h:5:
In file included from ../include/linux/fs_parser.h:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/shmem.c:28:
In file included from ../include/linux/ramfs.h:5:
In file included from ../include/linux/fs_parser.h:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/shmem.c:28:
In file included from ../include/linux/ramfs.h:5:
In file included from ../include/linux/fs_parser.h:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/shmem.c:28:
In file included from ../include/linux/ramfs.h:5:
In file included from ../include/linux/fs_parser.h:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/shmem.c:28:
In file included from ../include/linux/ramfs.h:5:
In file included from ../include/linux/fs_parser.h:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/shmem.c:28:
In file included from ../include/linux/ramfs.h:5:
In file included from ../include/linux/fs_parser.h:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/shmem.c:28:
In file included from ../include/linux/ramfs.h:5:
In file included from ../include/linux/fs_parser.h:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      arch/riscv/kernel/smpboot.o
  CC      kernel/power/process.o
13 warnings generated.
  CC      mm/util.o
In file included from ../kernel/power/process.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/power/process.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/power/process.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/power/process.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/power/process.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/power/process.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/power/process.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/power/process.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
  CC      fs/proc/consoles.o
In file included from ../kernel/power/process.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/smpboot.c:18:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/smpboot.c:18:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/smpboot.c:18:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/smpboot.c:18:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/smpboot.c:18:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/smpboot.c:18:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/smpboot.c:18:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/smpboot.c:18:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/smpboot.c:18:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../mm/util.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/util.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/util.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/util.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/util.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/util.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/util.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/util.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/util.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      arch/riscv/kernel/smp.o
13 warnings generated.
13 warnings generated.
  CC      mm/mmzone.o
  CC      kernel/power/suspend.o
  CC      fs/proc/cpuinfo.o
In file included from ../arch/riscv/kernel/smp.c:12:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/smp.c:12:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/smp.c:12:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/smp.c:12:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/smp.c:12:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/smp.c:12:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/smp.c:12:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/smp.c:12:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/smp.c:12:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      arch/riscv/kernel/cpu_ops.o
  CC      mm/vmstat.o
In file included from ../kernel/power/suspend.c:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/power/suspend.c:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/power/suspend.c:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/power/suspend.c:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/power/suspend.c:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/power/suspend.c:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/power/suspend.c:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/power/suspend.c:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/power/suspend.c:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      fs/proc/devices.o
13 warnings generated.
  AR      kernel/power/built-in.a
  CC      kernel/printk/printk.o
  CC      arch/riscv/kernel/cpu_ops_spinwait.o
In file included from ../mm/vmstat.c:26:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/vmstat.c:26:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/vmstat.c:26:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/vmstat.c:26:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/vmstat.c:26:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/vmstat.c:26:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/vmstat.c:26:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/vmstat.c:26:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/vmstat.c:26:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/proc/devices.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/proc/devices.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/proc/devices.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/devices.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/devices.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/devices.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/devices.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/devices.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/devices.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/proc/interrupts.o
  AS      arch/riscv/kernel/suspend_entry.o
  CC      arch/riscv/kernel/suspend.o
13 warnings generated.
In file included from ../kernel/printk/printk.c:24:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/printk/printk.c:24:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/printk/printk.c:24:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/printk/printk.c:24:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/printk/printk.c:24:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/printk/printk.c:24:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/printk/printk.c:24:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/printk/printk.c:24:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/printk/printk.c:24:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      mm/backing-dev.o
In file included from ../arch/riscv/kernel/suspend.c:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/suspend.c:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/suspend.c:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/suspend.c:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/suspend.c:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/suspend.c:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/suspend.c:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/suspend.c:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/suspend.c:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/proc/interrupts.c:4:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/proc/interrupts.c:4:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/proc/interrupts.c:4:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/interrupts.c:4:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/interrupts.c:4:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/interrupts.c:4:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/interrupts.c:4:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/interrupts.c:4:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/interrupts.c:4:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/proc/loadavg.o
In file included from ../mm/backing-dev.c:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/backing-dev.c:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/backing-dev.c:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/backing-dev.c:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/backing-dev.c:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/backing-dev.c:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/backing-dev.c:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/backing-dev.c:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/backing-dev.c:3:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      arch/riscv/kernel/perf_regs.o
13 warnings generated.
  CC      kernel/printk/printk_safe.o
13 warnings generated.
  CC      mm/mm_init.o
  CC      fs/proc/meminfo.o
In file included from ../kernel/printk/printk_safe.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/printk/printk_safe.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/printk/printk_safe.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/printk/printk_safe.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/printk/printk_safe.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/printk/printk_safe.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/printk/printk_safe.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/printk/printk_safe.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/printk/printk_safe.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/perf_regs.c:6:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/perf_regs.c:6:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/perf_regs.c:6:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/perf_regs.c:6:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/perf_regs.c:6:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/perf_regs.c:6:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/perf_regs.c:6:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/perf_regs.c:6:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/perf_regs.c:6:
In file included from ../include/linux/perf_event.h:52:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      arch/riscv/kernel/cpu-hotplug.o
In file included from ../mm/mm_init.c:20:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/mm_init.c:20:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/mm_init.c:20:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/mm_init.c:20:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/mm_init.c:20:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/mm_init.c:20:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/mm_init.c:20:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/mm_init.c:20:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/mm_init.c:20:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/printk/nbcon.o
In file included from ../fs/proc/meminfo.c:6:
In file included from ../include/linux/hugetlb.h:10:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/proc/meminfo.c:6:
In file included from ../include/linux/hugetlb.h:10:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/proc/meminfo.c:6:
In file included from ../include/linux/hugetlb.h:10:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/meminfo.c:6:
In file included from ../include/linux/hugetlb.h:10:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/meminfo.c:6:
In file included from ../include/linux/hugetlb.h:10:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/meminfo.c:6:
In file included from ../include/linux/hugetlb.h:10:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/meminfo.c:6:
In file included from ../include/linux/hugetlb.h:10:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/meminfo.c:6:
In file included from ../include/linux/hugetlb.h:10:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/meminfo.c:6:
In file included from ../include/linux/hugetlb.h:10:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/proc/stat.o
13 warnings generated.
  CC      mm/percpu.o
In file included from ../arch/riscv/kernel/cpu-hotplug.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/kernel/cpu-hotplug.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/kernel/cpu-hotplug.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/cpu-hotplug.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/cpu-hotplug.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/cpu-hotplug.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/cpu-hotplug.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/cpu-hotplug.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/kernel/cpu-hotplug.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      arch/riscv/kernel/jump_label.o
  CC      kernel/printk/printk_ringbuffer.o
In file included from ../fs/proc/stat.c:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/proc/stat.c:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/proc/stat.c:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/stat.c:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/stat.c:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/stat.c:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/stat.c:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/stat.c:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/stat.c:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../mm/percpu.c:89:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/percpu.c:89:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/percpu.c:89:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/percpu.c:89:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/percpu.c:89:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/percpu.c:89:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/percpu.c:89:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/percpu.c:89:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/percpu.c:89:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/proc/uptime.o
  AR      arch/riscv/kernel/built-in.a
  CC      arch/riscv/mm/init.o
  CC      kernel/printk/sysctl.o
  AR      kernel/printk/built-in.a
In file included from ../fs/proc/uptime.c:9:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/proc/uptime.c:9:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/proc/uptime.c:9:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/uptime.c:9:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/uptime.c:9:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/uptime.c:9:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/uptime.c:9:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/uptime.c:9:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/uptime.c:9:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      kernel/irq/irqdesc.o
In file included from ../arch/riscv/mm/init.c:13:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/mm/init.c:13:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/mm/init.c:13:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/mm/init.c:13:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/mm/init.c:13:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/mm/init.c:13:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/mm/init.c:13:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/mm/init.c:13:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/mm/init.c:13:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/proc/util.o
13 warnings generated.
  CC      mm/slab_common.o
13 warnings generated.
  CC      arch/riscv/mm/cacheflush.o
In file included from ../kernel/irq/irqdesc.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/irq/irqdesc.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/irq/irqdesc.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/irqdesc.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/irqdesc.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/irqdesc.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/irqdesc.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/irqdesc.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/irqdesc.c:10:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      fs/proc/version.o
In file included from ../mm/slab_common.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/slab_common.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/slab_common.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/slab_common.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/slab_common.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/slab_common.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/slab_common.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/slab_common.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/slab_common.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/irq/handle.o
  CC      arch/riscv/mm/context.o
13 warnings generated.
  CC      mm/compaction.o
  CC      fs/proc/softirqs.o
In file included from ../kernel/irq/handle.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/irq/handle.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/irq/handle.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/handle.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/handle.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/handle.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/handle.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/handle.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/handle.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      arch/riscv/mm/pmem.o
In file included from ../fs/proc/softirqs.c:3:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/proc/softirqs.c:3:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/proc/softirqs.c:3:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/softirqs.c:3:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/softirqs.c:3:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/softirqs.c:3:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/softirqs.c:3:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/softirqs.c:3:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/softirqs.c:3:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
In file included from ../mm/compaction.c:12:
In file included from ../include/linux/swap.h:9:
  CC      kernel/irq/manage.o
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/compaction.c:12:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/compaction.c:12:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/compaction.c:12:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/compaction.c:12:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/compaction.c:12:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/compaction.c:12:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/compaction.c:12:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/compaction.c:12:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      mm/show_mem.o
13 warnings generated.
  CC      fs/proc/namespaces.o
In file included from ../kernel/irq/manage.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/irq/manage.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/irq/manage.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/manage.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/manage.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/manage.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/manage.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/manage.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/manage.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../arch/riscv/mm/pmem.c:7:
In file included from ../include/linux/libnvdimm.h:14:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../arch/riscv/mm/pmem.c:7:
In file included from ../include/linux/libnvdimm.h:14:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../arch/riscv/mm/pmem.c:7:
In file included from ../include/linux/libnvdimm.h:14:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/mm/pmem.c:7:
In file included from ../include/linux/libnvdimm.h:14:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/mm/pmem.c:7:
In file included from ../include/linux/libnvdimm.h:14:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../arch/riscv/mm/pmem.c:7:
In file included from ../include/linux/libnvdimm.h:14:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/mm/pmem.c:7:
In file included from ../include/linux/libnvdimm.h:14:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/mm/pmem.c:7:
In file included from ../include/linux/libnvdimm.h:14:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../arch/riscv/mm/pmem.c:7:
In file included from ../include/linux/libnvdimm.h:14:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  AR      arch/riscv/mm/built-in.a
  AR      arch/riscv/net/built-in.a
  AR      arch/riscv/errata/built-in.a
  CC      arch/riscv/purgatory/purgatory.o
  CC      arch/riscv/purgatory/sha256.o
In file included from ../mm/show_mem.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/show_mem.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/show_mem.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/show_mem.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/show_mem.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/show_mem.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/show_mem.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/show_mem.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/show_mem.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/proc/namespaces.c:8:
In file included from ../include/net/net_namespace.h:43:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/proc/namespaces.c:8:
In file included from ../include/net/net_namespace.h:43:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/proc/namespaces.c:8:
In file included from ../include/net/net_namespace.h:43:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/namespaces.c:8:
In file included from ../include/net/net_namespace.h:43:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/namespaces.c:8:
In file included from ../include/net/net_namespace.h:43:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/namespaces.c:8:
In file included from ../include/net/net_namespace.h:43:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/namespaces.c:8:
In file included from ../include/net/net_namespace.h:43:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/namespaces.c:8:
In file included from ../include/net/net_namespace.h:43:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/namespaces.c:8:
In file included from ../include/net/net_namespace.h:43:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/proc/self.o
13 warnings generated.
  CC      kernel/irq/spurious.o
13 warnings generated.
  CC      mm/interval_tree.o
  AS      arch/riscv/purgatory/entry.o
In file included from ../kernel/irq/spurious.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/irq/spurious.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/irq/spurious.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/spurious.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/spurious.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/spurious.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/spurious.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/spurious.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/spurious.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      arch/riscv/purgatory/string.o
  CC      fs/proc/thread_self.o
  CC      arch/riscv/purgatory/ctype.o
  AS      arch/riscv/purgatory/memcpy.o
In file included from ../mm/interval_tree.c:10:
In file included from ../include/linux/rmap.h:12:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/interval_tree.c:10:
In file included from ../include/linux/rmap.h:12:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/interval_tree.c:10:
In file included from ../include/linux/rmap.h:12:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/interval_tree.c:10:
In file included from ../include/linux/rmap.h:12:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/interval_tree.c:10:
In file included from ../include/linux/rmap.h:12:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/interval_tree.c:10:
In file included from ../include/linux/rmap.h:12:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/interval_tree.c:10:
In file included from ../include/linux/rmap.h:12:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/interval_tree.c:10:
In file included from ../include/linux/rmap.h:12:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/interval_tree.c:10:
In file included from ../include/linux/rmap.h:12:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AS      arch/riscv/purgatory/memset.o
13 warnings generated.
  CC      kernel/irq/resend.o
  AS      arch/riscv/purgatory/strcmp.o
  AS      arch/riscv/purgatory/strlen.o
13 warnings generated.
  CC      mm/list_lru.o
  AS      arch/riscv/purgatory/strncmp.o
  LD      arch/riscv/purgatory/purgatory.ro
  LD      arch/riscv/purgatory/purgatory.chk
  AS      arch/riscv/purgatory/kexec-purgatory.o
In file included from ../kernel/irq/resend.c:15:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/irq/resend.c:15:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/irq/resend.c:15:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/resend.c:15:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/resend.c:15:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/resend.c:15:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/resend.c:15:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/resend.c:15:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/resend.c:15:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      fs/proc/proc_sysctl.o
  AR      arch/riscv/purgatory/built-in.a
  AR      arch/riscv/built-in.a
  AR      ipc/built-in.a
  CC      security/commoncap.o
13 warnings generated.
  CC      kernel/irq/chip.o
In file included from ../mm/list_lru.c:14:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/list_lru.c:14:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/list_lru.c:14:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/list_lru.c:14:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/list_lru.c:14:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/list_lru.c:14:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/list_lru.c:14:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/list_lru.c:14:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/list_lru.c:14:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      mm/workingset.o
In file included from ../fs/proc/proc_sysctl.c:10:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/proc/proc_sysctl.c:10:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/proc/proc_sysctl.c:10:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/proc_sysctl.c:10:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/proc_sysctl.c:10:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/proc_sysctl.c:10:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/proc_sysctl.c:10:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/proc_sysctl.c:10:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/proc_sysctl.c:10:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/irq/chip.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/irq/chip.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/irq/chip.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/chip.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/chip.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/chip.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/chip.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/chip.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/chip.c:11:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../security/commoncap.c:9:
In file included from ../include/linux/lsm_hooks.h:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../security/commoncap.c:9:
In file included from ../include/linux/lsm_hooks.h:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../security/commoncap.c:9:
In file included from ../include/linux/lsm_hooks.h:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../security/commoncap.c:9:
In file included from ../include/linux/lsm_hooks.h:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../security/commoncap.c:9:
In file included from ../include/linux/lsm_hooks.h:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../security/commoncap.c:9:
In file included from ../include/linux/lsm_hooks.h:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../security/commoncap.c:9:
In file included from ../include/linux/lsm_hooks.h:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../security/commoncap.c:9:
In file included from ../include/linux/lsm_hooks.h:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../security/commoncap.c:9:
In file included from ../include/linux/lsm_hooks.h:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../mm/workingset.c:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/workingset.c:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/workingset.c:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/workingset.c:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/workingset.c:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/workingset.c:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/workingset.c:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/workingset.c:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/workingset.c:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/irq/dummychip.o
13 warnings generated.
  AR      security/built-in.a
13 warnings generated.
  CC      fs/proc/kmsg.o
13 warnings generated.
  AR      crypto/built-in.a
  CC      mm/debug.o
  CC      block/partitions/core.o
In file included from ../kernel/irq/dummychip.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/irq/dummychip.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/irq/dummychip.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/dummychip.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/dummychip.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/dummychip.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/dummychip.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/dummychip.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/dummychip.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/proc/kmsg.c:18:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/proc/kmsg.c:18:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/proc/kmsg.c:18:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/kmsg.c:18:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/kmsg.c:18:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc/kmsg.c:18:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/kmsg.c:18:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/kmsg.c:18:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc/kmsg.c:18:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  AR      fs/proc/built-in.a
  CC      fs/kernfs/mount.o
13 warnings generated.
  CC      kernel/irq/devres.o
In file included from ../mm/debug.c:11:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/debug.c:11:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/debug.c:11:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/debug.c:11:
In file included from ../include/linux/trace_events.h:In file included from ../block/partitions/core.c:13:
In file included from ../block/partitions/check.h:2:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
9:
In file included from ../include/linux/hardirq.h../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
:11:
In file included from In file included from ../block/partitions/core.c:13:
In file included from ../block/partitions/check.h:2:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
./arch/riscv/include/generated/asm/hardirq.hIn file included from ../block/partitions/core.c:13:
In file included from ../block/partitions/check.h:2:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
:1../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
:
In file included from ../include/asm-generic/hardirq.h:17../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^../include/asm-generic/io.h
:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.hIn file included from :104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/partitions/core.c:13:
In file included from ../block/partitions/check.h:2:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
../mm/debug.c#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
:11:
In file included from ../include/linux/trace_events.h:9:
In file included from In file included from ../block/partitions/core.c../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h::13:
In file included from ../block/partitions/check.h:2:
In file included from ../include/linux/pagemap.h:11:
1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
In file included from         insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
:        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
106:53: note: In file included from ../block/partitions/core.c:13:
In file included from ../block/partitions/check.h:2:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:expanded from macro 'insl'
118:#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from In file included from ../block/partitions/core.c:13:
In file included from ../block/partitions/check.h:2:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);../mm/debug.c:11:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]

        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)In file included from ../mm/debug.c:11:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]

        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
                                           ~~~~~~~~~~ ^
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from In file included from ../mm/debug.c:11:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);../block/partitions/core.c:13:
In file included from ../block/partitions/check.h:2:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^

        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/partitions/core.c:13:
In file included from ../block/partitions/check.h:2:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../mm/debug.c:11:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
13 warnings generated.
  AR      block/partitions/built-in.a
  CC      mm/gup.o
  CC      block/bdev.o
In file included from ../fs/kernfs/mount.c:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/kernfs/mount.c:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/kernfs/mount.c:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernfs/mount.c:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernfs/mount.c:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernfs/mount.c:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/kernfs/mount.c:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/kernfs/mount.c:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/devres.c:3:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
In file included from ../fs/kernfs/mount.c../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
:15:
In file included from In file included from ../kernel/irq/devres.c:3:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
../include/linux/pagemap.h:11:
In file included from ../kernel/irq/devres.c:3:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
In file included from ../include/linux/highmem.h:../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
12:
../include/asm-generic/io.hIn file included from :605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55:../include/asm-generic/io.h :744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
In file included from ../kernel/irq/devres.c:3:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;In file included from ../kernel/irq/devres.c:3:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]

        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/irq/devres.c:3:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/devres.c:3:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/devres.c:3:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/devres.c:3:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/irq/irqdomain.o
13 warnings generated.
  CC      fs/kernfs/inode.o
In file included from ../block/bdev.c:14:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/bdev.c:14:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/bdev.c:14:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/bdev.c:14:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/bdev.c:14:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/bdev.c:14:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/bdev.c:14:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/bdev.c:14:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/bdev.c:14:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../mm/gup.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/gup.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/gup.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/gup.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/gup.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/gup.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/gup.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/gup.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/gup.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      mm/mmap_lock.o
In file included from ../kernel/irq/irqdomain.c:7:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/irq/irqdomain.c:7:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/irq/irqdomain.c:7:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/irqdomain.c:7:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/irqdomain.c:7:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/irqdomain.c:7:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/irqdomain.c:7:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/irqdomain.c:7:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/irqdomain.c:7:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
In file included from ../fs/kernfs/inode.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/kernfs/inode.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/kernfs/inode.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59:  CC      block/fops.o
 warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernfs/inode.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernfs/inode.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernfs/inode.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/kernfs/inode.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/kernfs/inode.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/kernfs/inode.c:10:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/kernfs/dir.o
13 warnings generated.
  CC      kernel/irq/proc.o
In file included from ../mm/mmap_lock.c:6:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/mmap_lock.c:6:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/mmap_lock.c:6:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/mmap_lock.c:6:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/mmap_lock.c:6:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/mmap_lock.c:6:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/mmap_lock.c:6:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/mmap_lock.c:6:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/mmap_lock.c:6:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../block/fops.c:9:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/fops.c:9:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/fops.c:9:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/fops.c:9:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/fops.c:9:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/fops.c:9:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/fops.c:9:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/fops.c:9:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/fops.c:9:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      mm/nommu.o
In file included from ../kernel/irq/proc.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/irq/proc.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/irq/proc.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/proc.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/proc.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/proc.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/proc.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/proc.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/proc.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
In file included from ../fs/kernfs/dir.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/kernfs/dir.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/kernfs/dir.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernfs/dir.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernfs/dir.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernfs/dir.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/kernfs/dir.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/kernfs/dir.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
  CC      block/bio.o
In file included from ../fs/kernfs/dir.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/irq/cpuhotplug.o
In file included from ../mm/nommu.c:23:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/nommu.c:23:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/nommu.c:23:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/nommu.c:23:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/nommu.c:23:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/nommu.c:23:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/nommu.c:23:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/nommu.c:23:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/nommu.c:23:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/kernfs/file.o
In file included from ../kernel/irq/cpuhotplug.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/irq/cpuhotplug.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/irq/cpuhotplug.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/cpuhotplug.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/cpuhotplug.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/cpuhotplug.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/cpuhotplug.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/cpuhotplug.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/cpuhotplug.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../block/bio.c:6:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/bio.c:6:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/bio.c:6:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/bio.c:6:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/bio.c:6:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/bio.c:6:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/bio.c:6:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/bio.c:6:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/bio.c:6:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
13 warnings generated.
  CC      mm/page_alloc.o
  CC      kernel/irq/pm.o
In file included from ../fs/kernfs/file.c:14:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/kernfs/file.c:14:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/kernfs/file.c:14:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernfs/file.c:14:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernfs/file.c:14:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernfs/file.c:14:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/kernfs/file.c:14:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/kernfs/file.c:14:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/kernfs/file.c:14:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      block/elevator.o
13 warnings generated.
  CC      fs/kernfs/symlink.o
In file included from ../kernel/irq/pm.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/irq/pm.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/irq/pm.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/pm.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/pm.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/pm.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/pm.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/pm.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/pm.c:8:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../mm/page_alloc.c:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/page_alloc.c:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/page_alloc.c:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/page_alloc.c:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/page_alloc.c:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/page_alloc.c:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/page_alloc.c:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/page_alloc.c:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/page_alloc.c:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/irq/msi.o
In file included from ../block/elevator.c:28:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/elevator.c:28:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/elevator.c:28:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/elevator.c:28:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/elevator.c:28:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/elevator.c:28:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/elevator.c:28:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/elevator.c:28:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/elevator.c:28:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/kernfs/symlink.c:14:
In file included from ../fs/kernfs/kernfs-internal.h:20:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/kernfs/symlink.c:14:
In file included from ../fs/kernfs/kernfs-internal.h:20:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/kernfs/symlink.c:14:
In file included from ../fs/kernfs/kernfs-internal.h:20:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernfs/symlink.c:14:
In file included from ../fs/kernfs/kernfs-internal.h:20:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernfs/symlink.c:14:
In file included from ../fs/kernfs/kernfs-internal.h:20:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernfs/symlink.c:14:
In file included from ../fs/kernfs/kernfs-internal.h:20:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/kernfs/symlink.c:14:
In file included from ../fs/kernfs/kernfs-internal.h:20:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/kernfs/symlink.c:14:
In file included from ../fs/kernfs/kernfs-internal.h:20:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/kernfs/symlink.c:14:
In file included from ../fs/kernfs/kernfs-internal.h:20:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  AR      fs/kernfs/built-in.a
  CC      fs/sysfs/file.o
13 warnings generated.
  CC      block/blk-core.o
In file included from ../kernel/irq/msi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/irq/msi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/irq/msi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/msi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/msi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/msi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/msi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/msi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/msi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/irq/ipi.o
13 warnings generated.
  CC      mm/init-mm.o
  CC      fs/sysfs/dir.o
In file included from ../block/blk-core.c:17:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/blk-core.c:17:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-core.c:17:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-core.c:17:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-core.c:17:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-core.c:17:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-core.c:17:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-core.c:17:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-core.c:17:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/irq/ipi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/irq/ipi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/irq/ipi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/ipi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/ipi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/ipi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/ipi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/ipi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/ipi.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      block/blk-sysfs.o
  CC      fs/sysfs/symlink.o
13 warnings generated.
In file included from ../mm/init-mm.c:13:
In file included from ../include/linux/iommu.h:10:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/init-mm.c:13:
In file included from ../include/linux/iommu.h:10:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/init-mm.c:13:
In file included from ../include/linux/iommu.h:10:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h  CC      kernel/irq/ipi-mux.o
:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/init-mm.c:13:
In file included from ../include/linux/iommu.h:10:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/init-mm.c:13:
In file included from ../include/linux/iommu.h:10:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/init-mm.c:13:
In file included from ../include/linux/iommu.h:10:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/init-mm.c:13:
In file included from ../include/linux/iommu.h:10:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/init-mm.c:13:
In file included from ../include/linux/iommu.h:10:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/init-mm.c:13:
In file included from ../include/linux/iommu.h:10:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      mm/memblock.o
In file included from ../kernel/irq/ipi-mux.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/irq/ipi-mux.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/irq/ipi-mux.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/ipi-mux.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/ipi-mux.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/ipi-mux.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/ipi-mux.c:12:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: In file included from ../block/blk-sysfs.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
expanded from macro 'outsw'
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/ipi-mux.c:12:
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
In file included from ../include/linux/irq.h:        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
20../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
:
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
In file included from ../block/blk-sysfs.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        ^~~~~~~~~~~~~~~~~~~~~~~~~~        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'

                                                        ~~~~~~~~~~ ^#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^

../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-sysfs.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-sysfs.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-sysfs.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-sysfs.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-sysfs.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/ipi-mux.c:12:
In file included from ../include/linux/irq.hIn file included from :20../block/blk-sysfs.c:
:In file included from 8../include/linux/io.h:
:In file included from 14../include/linux/bio.h:
:In file included from 10../arch/riscv/include/asm/io.h:
:In file included from 136../include/linux/blk_types.h:
:../include/asm-generic/io.h10:
:In file included from 1115../include/linux/bvec.h::5510::
 warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-sysfs.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/sysfs/symlink.c:16:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/sysfs/symlink.c:16:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/sysfs/symlink.c:16:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/sysfs/symlink.c:16:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/sysfs/symlink.c:16:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/sysfs/symlink.c:16:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/sysfs/symlink.c:16:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/sysfs/symlink.c:16:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/sysfs/symlink.c:16:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../mm/memblock.c:21:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/memblock.c:21:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/memblock.c:21:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/memblock.c:21:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/memblock.c:21:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/memblock.c:21:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/memblock.c:21:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/memblock.c:21:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/memblock.c:21:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
13 warnings generated.
  CC      kernel/irq/affinity.o
  CC      fs/sysfs/mount.o
13 warnings generated.
  CC      block/blk-flush.o
In file included from ../kernel/irq/affinity.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/irq/affinity.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/irq/affinity.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/affinity.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/affinity.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/affinity.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/affinity.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/affinity.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/affinity.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      mm/slub.o
In file included from ../fs/sysfs/mount.c:18:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/sysfs/mount.c:18:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/sysfs/mount.c:18:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/sysfs/mount.c:18:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/sysfs/mount.c:18:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/sysfs/mount.c:18:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/sysfs/mount.c:18:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/sysfs/mount.c:18:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/sysfs/mount.c:18:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../block/blk-flush.c:68:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/blk-flush.c:68:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-flush.c:68:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-flush.c:68:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-flush.c:68:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-flush.c:68:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
13 warningIn file included from ../block/blk-flush.c:68:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
sIn file included from ../block/blk-flush.c:68:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1 generated:
.
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-flush.c:68:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      kernel/irq/matrix.o
13 warnings generated.
  CC      fs/sysfs/group.o
13 warnings generated.
  CC      block/blk-settings.o
In file included from ../mm/slub.c:14:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/slub.c:14:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/slub.c:14:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/slub.c:14:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/slub.c:14:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/slub.c:14:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/slub.c:14:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/slub.c:14:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/slub.c:14:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/irq/matrix.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/irq/matrix.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/irq/matrix.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/matrix.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/matrix.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq/matrix.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/matrix.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/matrix.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq/matrix.c:9:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      fs/sysfs/built-in.a
In file included from ../block/blk-settings.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/blk-settings.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h  CC      fs/devpts/inode.o
:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-settings.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-settings.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-settings.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-settings.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-settings.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-settings.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-settings.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  AR      kernel/irq/built-in.a
13 warnings generated.
  CC      mm/dmapool.o
  CC      kernel/rcu/update.o
13 warnings generated.
  CC      block/blk-ioc.o
In file included from ../kernel/rcu/update.c:25:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/rcu/update.c:25:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/rcu/update.c:25:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/rcu/update.c:25:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/rcu/update.c:25:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/rcu/update.c:25:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/rcu/update.c:25:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/rcu/update.c:25:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/rcu/update.c:25:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/devpts/inode.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/devpts/inode.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/devpts/inode.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/devpts/inode.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/devpts/inode.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/devpts/inode.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/devpts/inode.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/devpts/inode.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/devpts/inode.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../mm/dmapool.c:23:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/dmapool.c:23:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/dmapool.c:23:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/dmapool.c:23:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/dmapool.c:23:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/dmapool.c:23:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/dmapool.c:23:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/dmapool.c:23:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/dmapool.c:23:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  AR      fs/devpts/built-in.a
13 warnings generated.
  CC      fs/ext2/balloc.o
  CC      mm/early_ioremap.o
13 warnings generated.
  CC      kernel/rcu/sync.o
In file included from ../block/blk-ioc.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/blk-ioc.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-ioc.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-ioc.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-ioc.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-ioc.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-ioc.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-ioc.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-ioc.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/rcu/srcutree.o
In file included from ../mm/early_ioremap.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../mm/early_ioremap.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../mm/early_ioremap.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/early_ioremap.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/early_ioremap.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../mm/early_ioremap.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/early_ioremap.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/early_ioremap.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../mm/early_ioremap.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      block/blk-map.o
In file included from ../fs/ext2/balloc.c:15:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/ext2/balloc.c:15:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/ext2/balloc.c:15:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/balloc.c:15:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/balloc.c:15:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/balloc.c:15:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/balloc.c:15:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/balloc.c:15:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/balloc.c:15:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  AR      mm/built-in.a
  CC      fs/ext2/dir.o
13 warnings generated.
  CC      fs/ext2/file.o
In file included from ../block/blk-map.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/blk-map.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-map.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-map.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-map.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-map.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-map.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-map.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-map.c:8:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      block/blk-merge.o
  CC      kernel/rcu/tree.o
In file included from ../fs/ext2/dir.c:25:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/ext2/dir.c:25:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/ext2/dir.c:25:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/dir.c:25:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/dir.c:25:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/dir.c:25:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/dir.c:25:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/dir.c:25:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/dir.c:25:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/ext2/file.c:23:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/ext2/file.c:23:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/ext2/file.c:23:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/file.c:23:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/file.c:23:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/file.c:23:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/file.c:23:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/file.c:23:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/file.c:23:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/ext2/ialloc.o
13 warnings generated.
  CC      fs/ext2/inode.o
In file included from ../kernel/rcu/tree.c:26:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/rcu/tree.c:26:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/rcu/tree.c:26:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/rcu/tree.c:26:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/rcu/tree.c:26:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/rcu/tree.c:26:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/rcu/tree.c:26:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/rcu/tree.c:26:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/rcu/tree.c:26:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../block/blk-merge.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/blk-merge.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-merge.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-merge.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-merge.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-merge.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-merge.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-merge.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-merge.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/ext2/ialloc.c:18:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10In file included from :
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
../fs/ext2/inode.c:28:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
17:
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: ../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
warning:         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'

#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
                          ~~~~~~~~~~ ^
In file included from ../fs/ext2/ialloc.c:../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
18        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]

                                                        ~~~~~~~~~~ ^        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'

#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/ext2/ialloc.c:18:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from In file included from ../fs/ext2/inode.c:28:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
../include/linux/bvec.h        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]

        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
../include/asm-generic/io.h                                                  ^
:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
In file included from ../fs/ext2/inode.c:28:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
../include/linux/highmem.h        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/ialloc.c:18:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
:#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)53: note: expanded from macro 'insw'

#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/ialloc.c:In file included from ../fs/ext2/inode.c:28:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
18        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
:
In file included from #define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.hIn file included from :10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
../fs/ext2/inode.c        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
:#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)28:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]

        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
                                         ~~~~~~~~~~ ^#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^

In file included from ../fs/ext2/inode.c:In file included from ../fs/ext2/ialloc.c:18:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);28:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]

        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
        ^~~~~~~~~~~~~~~~~~~~~~~~~~#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'

                                           ~~~~~~~~~~ ^#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^

In file included from In file included from ../fs/ext2/inode.c:28:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);../fs/ext2/ialloc.c:18:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]

        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
        ^~~~~~~~~~~~~~~~~~~~~~~~~~#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'

#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)                                           ~~~~~~~~~~ ^

                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/ialloc.c:In file included from ../fs/ext2/inode.c:28:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
18        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
:
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/inode.c:28:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/ext2/ialloc.c:18:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      block/blk-timeout.o
13 warnings generated.
  CC      fs/ext2/ioctl.o
13 warnings generated.
  CC      fs/ext2/namei.o
In file included from ../block/blk-timeout.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/blk-timeout.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-timeout.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-timeout.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-timeout.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-timeout.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-timeout.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-timeout.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-timeout.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/ext2/ioctl.c:11:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/ext2/ioctl.c:11:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/ext2/ioctl.c:11:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/ioctl.c:11:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/ioctl.c:11:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/ioctl.c:11:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/ioctl.c:11:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/ioctl.c:11:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/ioctl.c:11:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      block/blk-lib.o
13 warnings generated.
  CC      fs/ext2/super.o
In file included from ../fs/ext2/namei.c:34:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/ext2/namei.c:34:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/ext2/namei.c:34:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/namei.c:34:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/namei.c:34:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/namei.c:34:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/namei.c:34:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/namei.c:34:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/namei.c:34:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/ext2/symlink.o
In file included from ../block/blk-lib.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/blk-lib.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-lib.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-lib.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-lib.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-lib.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-lib.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-lib.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-lib.c:7:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/ext2/super.c:25:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/ext2/super.c:25:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/ext2/super.c:25:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/super.c:25:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/super.c:25:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/super.c:25:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/super.c:25:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/super.c:25:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/super.c:25:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
13 warnings generated.
  CC      kernel/rcu/rcu_segcblist.o
  CC      block/blk-mq.o
In file included from ../fs/ext2/symlink.c:21:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/ext2/symlink.c:21:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/ext2/symlink.c:21:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/symlink.c:21:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/symlink.c:21:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/symlink.c:21:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/symlink.c:21:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/symlink.c:21:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/symlink.c:21:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/ext2/trace.o
13 warnings generated.
  CC      block/blk-mq-tag.o
In file included from ../kernel/rcu/rcu_segcblist.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/rcu/rcu_segcblist.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/rcu/rcu_segcblist.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/rcu/rcu_segcblist.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/rcu/rcu_segcblist.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/rcu/rcu_segcblist.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/rcu/rcu_segcblist.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/rcu/rcu_segcblist.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/rcu/rcu_segcblist.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../block/blk-mq.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/blk-mq.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-mq.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  AR      kernel/rcu/built-in.a
In file included from ../fs/ext2/trace.c:2:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/ext2/trace.c:2:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/ext2/trace.c:2:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/trace.c:2:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/trace.c:2:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ext2/trace.c:2:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/trace.c:2:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/trace.c:2:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ext2/trace.c:2:
In file included from ../fs/ext2/ext2.h:20:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      kernel/livepatch/built-in.a
  CC      kernel/dma/mapping.o
13 warnings generated.
  AR      fs/ext2/built-in.a
  CC      fs/ramfs/inode.o
In file included from ../block/blk-mq-tag.c:13:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/blk-mq-tag.c:13:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-mq-tag.c:13:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq-tag.c:13:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq-tag.c:13:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq-tag.c:13:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq-tag.c:13:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq-tag.c:13:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq-tag.c:13:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/entry/common.o
In file included from ../fs/ramfs/inode.c:27:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/ramfs/inode.c:27:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/ramfs/inode.c:27:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ramfs/inode.c:27:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ramfs/inode.c:27:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ramfs/inode.c:27:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ramfs/inode.c:27:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ramfs/inode.c:27:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/dma/mapping.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/dma/mapping.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/dma/mapping.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: In file included from ../fs/ramfs/inode.c:27:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/dma/mapping.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/dma/mapping.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/dma/mapping.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/dma/mapping.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/dma/mapping.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/dma/mapping.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/ramfs/file-nommu.o
13 warnings generated.
  CC      kernel/dma/direct.o
In file included from ../kernel/entry/common.c:4:
In file included from ../include/linux/entry-common.h:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/entry/common.c:4:
In file included from ../include/linux/entry-common.h:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/entry/common.c:4:
In file included from ../include/linux/entry-common.h:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/entry/common.c:4:
In file included from ../include/linux/entry-common.h:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/entry/common.c:4:
In file included from ../include/linux/entry-common.h:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/entry/common.c:4:
In file included from ../include/linux/entry-common.h:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/entry/common.c:4:
In file included from ../include/linux/entry-common.h:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/entry/common.c:4:
In file included from ../include/linux/entry-common.h:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/entry/common.c:4:
In file included from ../include/linux/entry-common.h:7:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      block/blk-stat.o
13 warnings generated.
  CC      kernel/entry/syscall_user_dispatch.o
In file included from ../fs/ramfs/file-nommu.c:11:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/ramfs/file-nommu.c:11:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/ramfs/file-nommu.c:11:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ramfs/file-nommu.c:11:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ramfs/file-nommu.c:11:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ramfs/file-nommu.c:11:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ramfs/file-nommu.c:11:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ramfs/file-nommu.c:11:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ramfs/file-nommu.c:11:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/dma/direct.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/dma/direct.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/dma/direct.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/dma/direct.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/dma/direct.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/dma/direct.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/dma/direct.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/dma/direct.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/dma/direct.c:10:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../block/blk-stat.c:10:
In file included from ../block/blk-stat.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: 13performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
 warning        val = __raw_readb(PCI_IOBASE + addr);s generated.

                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/blk-stat.c:10:
In file included from ../block/blk-stat.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-stat.c:10:
In file included from ../block/blk-stat.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-stat.c:10:
In file included from ../block/blk-stat.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-stat.c:10:
In file included from ../block/blk-stat.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-stat.c:10:
In file included from ../block/blk-stat.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-stat.c:10:
In file included from ../block/blk-stat.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-stat.c:10:
In file included from ../block/blk-stat.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-stat.c:10:
In file included from ../block/blk-stat.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/dma/coherent.o
  AR      fs/ramfs/built-in.a
  AR      fs/unicode/built-in.a
  AR      fs/hostfs/built-in.a
  CC      fs/open.o
  AR      kernel/entry/built-in.a
13 warnings generated.
  CC      block/blk-mq-sysfs.o
  CC      kernel/time/time.o
In file included from ../kernel/dma/coherent.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/dma/coherent.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/dma/coherent.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/dma/coherent.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/dma/coherent.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/dma/coherent.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/dma/coherent.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/dma/coherent.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/dma/coherent.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/time/time.c:31:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/time/time.c:31:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/time/time.c:31:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/time.c:31:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/time.c:31:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/time.c:31:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/time.c:31:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/time.c:31:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/time.c:31:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/open.c:14:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/open.c:14:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/open.c:14:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/open.c:14:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/open.c:14:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/open.c:14:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/open.c:14:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/open.c:14:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/open.c:14:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  AR      kernel/dma/built-in.a
In file included from ../block/blk-mq-sysfs.c:4:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
  CC      kernel/futex/core.o
In file included from ../block/blk-mq-sysfs.c:4:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-mq-sysfs.c:4:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq-sysfs.c:4:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq-sysfs.c:4:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq-sysfs.c:4:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq-sysfs.c:4:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq-sysfs.c:4:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq-sysfs.c:4:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      block/blk-mq-cpumap.o
13 warnings generated.
  CC      kernel/time/timer.o
13 warnings generated.
  CC      fs/read_write.o
In file included from ../kernel/futex/core.c:36:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/futex/core.c:36:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/futex/core.c:36:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/futex/core.c:36:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/futex/core.c:36:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/futex/core.c:36:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/futex/core.c:36:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/futex/core.c:36:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/futex/core.c:36:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/time/timer.c:21:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/time/timer.c:21:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/time/timer.c:21:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/timer.c:21:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/timer.c:21:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/timer.c:21:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/timer.c:21:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/timer.c:21:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/timer.c:21:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../block/blk-mq-cpumap.c:15:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/blk-mq-cpumap.c:15:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-mq-cpumap.c:15:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq-cpumap.c:15:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq-cpumap.c:15:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq-cpumap.c:15:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq-cpumap.c:15:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq-cpumap.c:15:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq-cpumap.c:15:
In file included from ../block/blk.h:5:
In file included from ../include/linux/bio-integrity.h:5:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/futex/syscalls.o
13 warnings generated.
  CC      block/blk-mq-sched.o
In file included from ../fs/read_write.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/read_write.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/read_write.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/read_write.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/read_write.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/read_write.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/read_write.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/read_write.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/read_write.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/time/hrtimer.o
In file included from ../kernel/futex/syscalls.c:3:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/futex/syscalls.c:3:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/futex/syscalls.c:3:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/futex/syscalls.c:3:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/futex/syscalls.c:3:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/futex/syscalls.c:3:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/futex/syscalls.c:3:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/futex/syscalls.c:3:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/futex/syscalls.c:3:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../block/blk-mq-sched.c:11:
In file included from ../include/trace/events/block.h:8:
In file included from ../include/linux/blktrace_api.h:5:
In file included from ../include/linux/blk-mq.h:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/blk-mq-sched.c:11:
In file included from ../include/trace/events/block.h:8:
In file included from ../include/linux/blktrace_api.h:5:
In file included from ../include/linux/blk-mq.h:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-mq-sched.c:11:
In file included from ../include/trace/events/block.h:8:
In file included from ../include/linux/blktrace_api.h:5:
In file included from ../include/linux/blk-mq.h:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq-sched.c:11:
In file included from ../include/trace/events/block.h:8:
In file included from ../include/linux/blktrace_api.h:5:
In file included from ../include/linux/blk-mq.h:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq-sched.c:11:
In file included from ../include/trace/events/block.h:8:
In file included from ../include/linux/blktrace_api.h:5:
In file included from ../include/linux/blk-mq.h:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq-sched.c:11:
In file included from ../include/trace/events/block.h:8:
In file included from ../include/linux/blktrace_api.h:5:
In file included from ../include/linux/blk-mq.h:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq-sched.c:11:
In file included from ../include/trace/events/block.h:8:
In file included from ../include/linux/blktrace_api.h:5:
In file included from ../include/linux/blk-mq.h:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq-sched.c:11:
In file included from ../include/trace/events/block.h:8:
In file included from ../include/linux/blktrace_api.h:5:
In file included from ../include/linux/blk-mq.h:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq-sched.c:11:
In file included from ../include/trace/events/block.h:8:
In file included from ../include/linux/blktrace_api.h:5:
In file included from ../include/linux/blk-mq.h:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/file_table.o
13 warnings generated.
  CC      kernel/futex/pi.o
13 warnings generated.
  CC      block/ioctl.o
In file included from ../kernel/time/hrtimer.c:30:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/time/hrtimer.c:30:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/time/hrtimer.c:30:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/hrtimer.c:30:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/hrtimer.c:30:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/hrtimer.c:30:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/hrtimer.c:30:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/hrtimer.c:30:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/hrtimer.c:30:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/file_table.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/file_table.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/file_table.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/file_table.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/file_table.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/file_table.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/file_table.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/file_table.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/file_table.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      kernel/futex/requeue.o
13 warnings generated.
  CC      kernel/time/timekeeping.o
13 warnings generated.
In file included from ../block/ioctl.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/ioctl.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/ioctl.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/ioctl.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/ioctl.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/ioctl.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/ioctl.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/ioctl.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from   CC      fs/super.o
../block/ioctl.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/time/timekeeping.c:6:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/time/timekeeping.c:6:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/time/timekeeping.c:6:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/timekeeping.c:6:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/timekeeping.c:6:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/timekeeping.c:6:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/timekeeping.c:6:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/timekeeping.c:6:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/timekeeping.c:6:
In file included from ../include/linux/timekeeper_internal.h:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      block/genhd.o
In file included from ../fs/super.c:26:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/super.c:26:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from   CC      kernel/futex/waitwake.o
../fs/super.c:26:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/super.c:26:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/super.c:26:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/super.c:26:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/super.c:26:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/super.c:26:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/super.c:26:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
In file included from ../block/genhd.c:13:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/genhd.c:13:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/genhd.c:13:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/genhd.c:13:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/genhd.c:13:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/genhd.c:13:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/genhd.c:13:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/genhd.c:13:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
  CC      kernel/time/ntp.o
In file included from ../block/genhd.c:13:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/char_dev.o
  AR      kernel/futex/built-in.a
  CC      kernel/fork.o
In file included from ../kernel/time/ntp.c:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/time/ntp.c:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/time/ntp.c:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/ntp.c:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/ntp.c:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/ntp.c:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/ntp.c:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/ntp.c:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/ntp.c:10:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      block/ioprio.o
13 warnings generated.
  CC      kernel/time/clocksource.o
In file included from ../fs/char_dev.c:23:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/char_dev.c:23:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/char_dev.c:23:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/char_dev.c:23:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/char_dev.c:23:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/char_dev.c:23:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/char_dev.c:23:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/char_dev.c:23:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/char_dev.c:23:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/fork.c:35:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/fork.c:35:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/fork.c:35:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/fork.c:35:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/fork.c:35:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/fork.c:35:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/fork.c:35:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/fork.c:35:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/fork.c:35:
In file included from ../include/linux/mempolicy.h:15:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../block/ioprio.c:27:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/ioprio.c:27:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/ioprio.c:27:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/ioprio.c:27:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/ioprio.c:27:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/ioprio.c:27:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/ioprio.c:27:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/ioprio.c:27:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
13 warnings generated.
In file included from ../block/ioprio.c:27:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      fs/stat.o
13 warnings generated.
In file included from ../kernel/time/clocksource.c:11:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/time/clocksource.c:11:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/time/clocksource.c:11:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/clocksource.c:11:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/clocksource.c:11:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/clocksource.c:11:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/clocksource.c:11:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/clocksource.c:11:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
  CC      block/badblocks.o
In file included from ../kernel/time/clocksource.c:11:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/time/jiffies.o
In file included from ../fs/stat.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/stat.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/stat.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/stat.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/stat.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/stat.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/stat.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/stat.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/stat.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/exec_domain.o
In file included from ../kernel/time/jiffies.c:7:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/time/jiffies.c:7:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/time/jiffies.c:7:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/jiffies.c:7:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/jiffies.c:7:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/jiffies.c:7:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/jiffies.c:7:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/jiffies.c:7:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/jiffies.c:7:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/exec.o
13 warnings generated.
  CC      kernel/time/timer_list.o
  CC      block/blk-rq-qos.o
In file included from ../kernel/exec_domain.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/exec_domain.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/exec_domain.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/exec_domain.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/exec_domain.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/exec_domain.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/exec_domain.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/exec_domain.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/exec_domain.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/panic.o
In file included from ../fs/exec.c:33:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/exec.c:33:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/exec.c:33:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/exec.c:33:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/exec.c:33:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/exec.c:33:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/exec.c:33:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/exec.c:33:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/exec.c:33:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/time/timer_list.c:14:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/time/timer_list.c:14:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/time/timer_list.c:14:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/timer_list.c:14:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/timer_list.c:14:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/timer_list.c:14:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/timer_list.c:14:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/timer_list.c:14:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/timer_list.c:14:
In file included from ../include/linux/nmi.h:9:
In file included from ../arch/riscv/include/asm/irq.h:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../block/blk-rq-qos.c:3:
In file included from ../block/blk-rq-qos.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/blk-rq-qos.c:3:
In file included from ../block/blk-rq-qos.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-rq-qos.c:3:
In file included from ../block/blk-rq-qos.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-rq-qos.c:3:
In file included from ../block/blk-rq-qos.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-rq-qos.c:3:
In file included from ../block/blk-rq-qos.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-rq-qos.c:3:
In file included from ../block/blk-rq-qos.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-rq-qos.c:3:
In file included from ../block/blk-rq-qos.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-rq-qos.c:3:
In file included from ../block/blk-rq-qos.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:13 warnings generated.
10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-rq-qos.c:3:
In file included from ../block/blk-rq-qos.h:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      kernel/time/timeconv.o
In file included from ../kernel/panic.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/panic.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/panic.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/panic.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/panic.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/panic.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/panic.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/panic.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/panic.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      block/disk-events.o
13 warnings generated.
  CC      fs/pipe.o
  CC      kernel/time/timecounter.o
13 warnings generated.
  CC      kernel/cpu.o
  CC      kernel/time/alarmtimer.o
In file included from ../block/disk-events.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/disk-events.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/disk-events.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/disk-events.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/disk-events.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/disk-events.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/disk-events.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/disk-events.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/disk-events.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      block/blk-ia-ranges.o
In file included from ../kernel/time/alarmtimer.c:18:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/time/alarmtimer.c:18:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/time/alarmtimer.c:18:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/alarmtimer.c:18:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/alarmtimer.c:18:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/alarmtimer.c:18:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/alarmtimer.c:18:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/alarmtimer.c:18:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/alarmtimer.c:18:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/cpu.c:13:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/cpu.c:13:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/cpu.c:13:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/cpu.c:13:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/cpu.c:13:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/cpu.c:13:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/cpu.c:13:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/cpu.c:13:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/cpu.c:13:
In file included from ../include/linux/sched/isolation.h:7:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/pipe.c:17:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/pipe.c:17:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/pipe.c:17:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/pipe.c:17:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/pipe.c:17:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/pipe.c:17:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/pipe.c:17:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/pipe.c:17:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/pipe.c:17:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/time/posix-timers.o
In file included from ../block/blk-ia-ranges.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/blk-ia-ranges.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-ia-ranges.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-ia-ranges.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-ia-ranges.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-ia-ranges.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-ia-ranges.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-ia-ranges.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-ia-ranges.c:8:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/namei.o
13 warnings generated.
  CC      block/early-lookup.o
13 warnings generated.
  CC      kernel/exit.o
In file included from ../kernel/time/posix-timers.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/time/posix-timers.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/time/posix-timers.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-timers.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-timers.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-timers.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-timers.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-timers.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-timers.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/namei.c:25:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/namei.c:25:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/namei.c:25:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/namei.c:25:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/namei.c:25:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/namei.c:25:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/namei.c:25:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/namei.c:25:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/namei.c:25:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../block/early-lookup.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/early-lookup.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/early-lookup.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/early-lookup.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/early-lookup.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/early-lookup.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/early-lookup.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/early-lookup.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/early-lookup.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/exit.c:16:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/exit.c:16:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/exit.c:16:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/exit.c:16:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/exit.c:16:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/exit.c:16:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/exit.c:16:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/exit.c:16:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/exit.c:16:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/time/posix-cpu-timers.o
13 warnings generated.
  CC      block/blk-mq-virtio.o
In file included from ../kernel/time/posix-cpu-timers.c:12:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/time/posix-cpu-timers.c:12:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/time/posix-cpu-timers.c:12:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-cpu-timers.c:12:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-cpu-timers.c:12:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-cpu-timers.c:12:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-cpu-timers.c:12:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-cpu-timers.c:12:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-cpu-timers.c:12:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../block/blk-mq-virtio.c:7:
In file included from ../include/linux/virtio_config.h:7:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/blk-mq-virtio.c:7:
In file included from ../include/linux/virtio_config.h:7:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-mq-virtio.c:7:
In file included from ../include/linux/virtio_config.h:7:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq-virtio.c:7:
In file included from ../include/linux/virtio_config.h:7:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq-virtio.c:7:
In file included from ../include/linux/virtio_config.h:7:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-mq-virtio.c:7:
In file included from ../include/linux/virtio_config.h:7:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq-virtio.c:7:
In file included from ../include/linux/virtio_config.h:7:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq-virtio.c:7:
In file included from ../include/linux/virtio_config.h:7:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-mq-virtio.c:7:
In file included from ../include/linux/virtio_config.h:7:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/softirq.o
13 warnings generated.
  CC      block/blk-pm.o
13 warnings generated.
  CC      fs/fcntl.o
13 warnings generated.
  CC      kernel/time/posix-clock.o
In file included from ../kernel/softirq.c:13:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/softirq.c:13:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/softirq.c:13:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/softirq.c:13:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/softirq.c:13:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/softirq.c:13:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/softirq.c:13:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/softirq.c:13:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/softirq.c:13:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../block/blk-pm.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../block/blk-pm.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../block/blk-pm.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-pm.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-pm.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../block/blk-pm.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-pm.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-pm.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../block/blk-pm.c:4:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/fcntl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/fcntl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/fcntl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/fcntl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/fcntl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/fcntl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/fcntl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/fcntl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
13 warnings generated.
In file included from ../fs/fcntl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-clock.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/time/posix-clock.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/time/posix-clock.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
  AR      block/built-in.a
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-clock.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-clock.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-clock.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-clock.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-clock.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/posix-clock.c:12:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/math/div64.o
13 warnings generated.
  CC      kernel/resource.o
  CC      lib/math/gcd.o
13 warnings generated.
  CC      kernel/time/itimer.o
  CC      lib/math/lcm.o
  CC      lib/math/int_log.o
13 warnings generated.
  CC      fs/ioctl.o
  CC      lib/math/int_pow.o
  CC      lib/math/int_sqrt.o
  CC      lib/math/reciprocal_div.o
  CC      lib/math/rational.o
In file included from ../kernel/resource.c:21:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/resource.c:21:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/resource.c:21:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/resource.c:21:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/resource.c:21:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/resource.c:21:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/resource.c:21:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/resource.c:21:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/resource.c:21:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/time/itimer.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/time/itimer.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/time/itimer.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/itimer.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/itimer.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/itimer.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/itimer.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/itimer.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/itimer.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/ioctl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/ioctl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/ioctl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ioctl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ioctl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/ioctl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ioctl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ioctl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/ioctl.c:8:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/sysctl.o
13 warnings generated.
  CC      kernel/time/clockevents.o
  AR      lib/math/built-in.a
  CC      lib/crypto/chacha.o
  CC      lib/crypto/blake2s.o
13 warnings generated.
  CC      fs/readdir.o
In file included from ../kernel/time/clockevents.c:10:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/time/clockevents.c:10:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/time/clockevents.c:10:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/clockevents.c:10:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/clockevents.c:10:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/clockevents.c:10:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/clockevents.c:10:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/clockevents.c:10:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/clockevents.c:10:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/sysctl.c:24:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/sysctl.c:24:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/sysctl.c:24:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/sysctl.c:24:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/sysctl.c:24:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/sysctl.c:24:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sysctl.c:24:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sysctl.c:24:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sysctl.c:24:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/time/tick-common.o
  CC      lib/crypto/blake2s-generic.o
In file included from ../fs/readdir.c:19:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/readdir.c:19:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/readdir.c:19:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/readdir.c:19:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/readdir.c:19:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/readdir.c:19:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/readdir.c:19:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/readdir.c:19:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/readdir.c:19:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/select.o
  CC      lib/crypto/blake2s-selftest.o
In file included from ../kernel/time/tick-common.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/time/tick-common.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/time/tick-common.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/tick-common.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/tick-common.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/tick-common.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/tick-common.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/tick-common.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/tick-common.c:14:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      lib/crypto/built-in.a
  CC      lib/zlib_inflate/inffast.o
13 warnings generated.
  CC      kernel/capability.o
13 warnings generated.
  CC      lib/zlib_inflate/inflate.o
  CC      kernel/time/tick-broadcast.o
In file included from ../fs/select.c:22:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/select.c:22:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/select.c:22:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/select.c:22:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/select.c:22:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/select.c:22:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/select.c:22:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/select.c:22:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/select.c:22:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/zlib_inflate/infutil.o
In file included from ../kernel/capability.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/capability.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/capability.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/capability.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/capability.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/capability.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/capability.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/capability.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/capability.c:17:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/time/tick-broadcast.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/time/tick-broadcast.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/time/tick-broadcast.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/tick-broadcast.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/tick-broadcast.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/tick-broadcast.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/tick-broadcast.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/tick-broadcast.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/tick-broadcast.c:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/zlib_inflate/inftrees.o
13 warnings generated.
  CC      kernel/ptrace.o
13 warnings generated.
  CC      kernel/time/sched_clock.o
  CC      lib/zlib_inflate/inflate_syms.o
13 warnings generated.
  CC      fs/dcache.o
In file included from ../kernel/time/sched_clock.c:6:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/time/sched_clock.c:6:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/time/sched_clock.c:6:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/sched_clock.c:6:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/sched_clock.c:6:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/time/sched_clock.c:6:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/sched_clock.c:6:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/sched_clock.c:6:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/time/sched_clock.c:6:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  AR      kernel/time/built-in.a
  CC      kernel/user.o
In file included from ../kernel/ptrace.c:19:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/ptrace.c:19:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/ptrace.c:19:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/ptrace.c:19:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/ptrace.c:19:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/ptrace.c:19:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/ptrace.c:19:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/ptrace.c:19:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/ptrace.c:19:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      lib/zlib_inflate/built-in.a
  CC      lib/zstd/zstd_decompress_module.o
In file included from ../kernel/user.c:18:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/user.c:18:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/user.c:18:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/user.c:18:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/user.c:18:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/user.c:18:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/user.c:18:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/user.c:18:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/user.c:18:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/dcache.c:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/dcache.c:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/dcache.c:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/dcache.c:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/dcache.c:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/dcache.c:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/dcache.c:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/dcache.c:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/dcache.c:29:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/signal.o
13 warnings generated.
  CC      kernel/sys.o
  CC      lib/zstd/decompress/huf_decompress.o
In file included from ../kernel/signal.c:27:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/signal.c:27:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/signal.c:27:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/signal.c:27:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/signal.c:27:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/signal.c:27:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/signal.c:27:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/signal.c:27:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/signal.c:27:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
In file included from ../kernel/sys.c:10:
In file included from ../include/linux/mm_inline.h:8:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/sys.c:10:
In file included from ../include/linux/mm_inline.h:8:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/sys.c:10:
In file included from ../include/linux/mm_inline.h:8:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
  CC      fs/inode.o
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/sys.c:10:
In file included from ../include/linux/mm_inline.h:8:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/sys.c:10:
In file included from ../include/linux/mm_inline.h:8:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/sys.c:10:
In file included from ../include/linux/mm_inline.h:8:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sys.c:10:
In file included from ../include/linux/mm_inline.h:8:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sys.c:10:
In file included from ../include/linux/mm_inline.h:8:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/sys.c:10:
In file included from ../include/linux/mm_inline.h:8:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/zstd/decompress/zstd_ddict.o
  CC      lib/zstd/decompress/zstd_decompress.o
In file included from ../fs/inode.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/inode.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/inode.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/inode.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/inode.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/inode.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/inode.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/inode.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/inode.c:10:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/umh.o
13 warnings generated.
  CC      kernel/workqueue.o
  CC      lib/zstd/decompress/zstd_decompress_block.o
In file included from ../kernel/workqueue.c:32:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/workqueue.c:32:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/workqueue.c:32:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/workqueue.c:32:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/workqueue.c:32:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/workqueue.c:32:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/workqueue.c:32:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/workqueue.c:32:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/workqueue.c:32:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
In file included from ../kernel/umh.c:9:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/umh.c:9:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/umh.c:9:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/umh.c:9:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/umh.c:9:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/umh.c:9:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/umh.c:9:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/umh.c:9:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/umh.c:9:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      fs/attr.o
13 warnings generated.
  CC      kernel/pid.o
  CC      lib/zstd/zstd_common_module.o
In file included from ../fs/attr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/attr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/attr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/attr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/attr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/attr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/attr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/attr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/attr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/pid.c:37:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/pid.c:37:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/pid.c:37:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/pid.c:37:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/pid.c:37:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/pid.c:37:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/pid.c:37:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/pid.c:37:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/pid.c:37:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/bad_inode.o
  CC      lib/zstd/common/debug.o
  CC      lib/zstd/common/entropy_common.o
  CC      fs/file.o
13 warnings generated.
  CC      lib/zstd/common/error_private.o
  CC      kernel/task_work.o
  CC      lib/zstd/common/fse_decompress.o
13 warnings generated.
  CC      kernel/extable.o
  CC      lib/zstd/common/zstd_common.o
  AR      lib/zstd/built-in.a
  CC      lib/argv_split.o
In file included from ../kernel/task_work.c:5:
In file included from ../include/linux/resume_user_mode.h:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/task_work.c:5:
In file included from ../include/linux/resume_user_mode.h:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/task_work.c:5:
In file included from ../include/linux/resume_user_mode.h:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/task_work.c:5:
In file included from ../include/linux/resume_user_mode.h:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/task_work.c:5:
In file included from ../include/linux/resume_user_mode.h:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/task_work.c:5:
In file included from ../include/linux/resume_user_mode.h:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/task_work.c:5:
In file included from ../include/linux/resume_user_mode.h:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/task_work.c:5:
In file included from ../include/linux/resume_user_mode.h:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/task_work.c:5:
In file included from ../include/linux/resume_user_mode.h:8:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/file.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/file.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/file.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/file.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/file.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/file.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/file.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/file.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/file.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/extable.c:7:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/extable.c:7:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/extable.c:7:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/extable.c:7:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/extable.c:7:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/extable.c:7:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/extable.c:7:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/extable.c:7:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/extable.c:7:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      lib/bug.o
  CC      lib/buildid.o
13 warnings generated.
  CC      kernel/params.o
13 warnings generated.
  CC      fs/filesystems.o
In file included from ../lib/bug.c:49:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../lib/bug.c:49:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../lib/bug.c:49:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/bug.c:49:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/bug.c:49:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/bug.c:49:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/bug.c:49:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/bug.c:49:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/bug.c:49:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../lib/buildid.c:7:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../lib/buildid.c:7:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../lib/buildid.c:7:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/buildid.c:7:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/buildid.c:7:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/buildid.c:7:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/buildid.c:7:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/buildid.c:7:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/buildid.c:7:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/kthread.o
13 warnings generated.
  CC      lib/cmdline.o
  CC      lib/cpumask.o
In file included from ../kernel/params.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/params.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/params.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/params.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/params.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/params.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/params.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/params.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/params.c:15:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/filesystems.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/filesystems.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/filesystems.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/filesystems.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/filesystems.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/filesystems.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/filesystems.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/filesystems.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/filesystems.c:10:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
In file included from ../kernel/kthread.c:19:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/kthread.c:19:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/kthread.c:19:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/kthread.c:19:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/kthread.c:19:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/kthread.c:19:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/kthread.c:19:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/kthread.c:19:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2:  CC      fs/namespace.o
 warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/kthread.c:19:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/sys_ni.o
  CC      kernel/nsproxy.o
  CC      lib/ctype.o
  CC      lib/dec_and_lock.o
13 warnings generated.
  CC      kernel/notifier.o
  CC      lib/decompress.o
In file included from ../kernel/nsproxy.c:15:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/nsproxy.c:15:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/nsproxy.c:15:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/nsproxy.c:15:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/nsproxy.c:15:
In file included from   CC      lib/decompress_inflate.o
../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/nsproxy.c:15:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/nsproxy.c:15:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/nsproxy.c:15:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/nsproxy.c:15:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/namespace.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/namespace.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/namespace.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/namespace.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/namespace.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/namespace.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/namespace.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/namespace.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/namespace.c:11:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/notifier.c:3:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/notifier.c:3:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/notifier.c:3:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/notifier.c:3:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/notifier.c:3:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/notifier.c:3:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/notifier.c:3:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/notifier.c:3:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/notifier.c:3:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/decompress_unzstd.o
13 warnings generated.
13 warnings generated.
  CC      kernel/ksysfs.o
  CC      kernel/cred.o
In file included from ../kernel/cred.c:17:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/cred.c:17:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/cred.c:17:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/cred.c:17:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/cred.c:17:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/cred.c:17:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/cred.c:17:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/cred.c:17:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/cred.c:17:
In file included from ../include/linux/init_task.h:9:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/dump_stack.o
In file included from ../kernel/ksysfs.c:15:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/ksysfs.c:15:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/ksysfs.c:15:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/ksysfs.c:15:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/ksysfs.c:15:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/ksysfs.c:15:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/ksysfs.c:15:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/ksysfs.c:15:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/ksysfs.c:15:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/reboot.o
13 warnings generated.
13 warnings generated.
  CC      kernel/async.o
  CC      fs/seq_file.o
In file included from ../lib/dump_stack.c:14:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../lib/dump_stack.c:14:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../lib/dump_stack.c:14:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/dump_stack.c:14:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/dump_stack.c:14:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/dump_stack.c:14:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/dump_stack.c:14:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/dump_stack.c:14:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/dump_stack.c:14:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      lib/earlycpio.o
In file included from ../kernel/reboot.c:13:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/reboot.c:13:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/reboot.c:13:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/reboot.c:13:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/reboot.c:13:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/reboot.c:13:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/reboot.c:13:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/reboot.c:13:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/reboot.c:13:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/extable.o
  CC      kernel/range.o
13 warnings generated.
  CC      kernel/smpboot.o
  CC      kernel/ucount.o
  CC      fs/xattr.o
  CC      lib/fdt.o
  CC      lib/fdt_addresses.o
  CC      lib/fdt_empty_tree.o
  CC      kernel/regset.o
  CC      lib/fdt_ro.o
  CC      kernel/ksyms_common.o
  CC      lib/fdt_rw.o
In file included from ../fs/xattr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/xattr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/xattr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/xattr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/xattr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/xattr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/xattr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/xattr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/xattr.c:18:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      kernel/groups.o
  CC      lib/fdt_strerror.o
  CC      lib/fdt_sw.o
  CC      lib/fdt_wip.o
13 warnings generated.
  CC      fs/libfs.o
  CC      lib/flex_proportions.o
In file included from ../kernel/ksyms_common.c:7:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/ksyms_common.c:7:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/ksyms_common.c:7:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/ksyms_common.c:7:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/ksyms_common.c:7:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/ksyms_common.c:7:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/ksyms_common.c:7:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/ksyms_common.c:7:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/ksyms_common.c:7:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      kernel/freezer.o
In file included from ../kernel/groups.c:8:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/groups.c:8:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/groups.c:8:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/groups.c:8:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/groups.c:8:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/groups.c:8:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/groups.c:8:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/groups.c:8:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/groups.c:8:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/idr.o
13 warnings generated.
  CC      kernel/smp.o
In file included from ../fs/libfs.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/libfs.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/libfs.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/libfs.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/libfs.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/libfs.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/libfs.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/libfs.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/libfs.c:7:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../kernel/freezer.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/freezer.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/freezer.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/freezer.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/freezer.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/freezer.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/freezer.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/freezer.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/freezer.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/irq_regs.o
In file included from ../kernel/smp.c:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/smp.c:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/smp.c:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/smp.c:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/smp.c:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/smp.c:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/smp.c:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/smp.c:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/smp.c:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/is_single_threaded.o
13 warnings generated.
  CC      kernel/stop_machine.o
13 warnings generated.
  CC      fs/fs-writeback.o
13 warnings generated.
  CC      kernel/seccomp.o
  CC      lib/klist.o
In file included from ../kernel/stop_machine.c:19:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/stop_machine.c:19:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/stop_machine.c:19:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/stop_machine.c:19:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/stop_machine.c:19:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/stop_machine.c:19:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/stop_machine.c:19:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/stop_machine.c:19:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/stop_machine.c:19:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/fs-writeback.c:24:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/fs-writeback.c:24:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/fs-writeback.c:24:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/fs-writeback.c:24:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/fs-writeback.c:24:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/fs-writeback.c:24:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/fs-writeback.c:24:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/fs-writeback.c:24:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/fs-writeback.c:24:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/kobject.o
13 warnings generated.
  CC      kernel/utsname_sysctl.o
In file included from ../kernel/seccomp.c:29:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/seccomp.c:29:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/seccomp.c:29:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/seccomp.c:29:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/seccomp.c:29:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/seccomp.c:29:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/seccomp.c:29:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/seccomp.c:29:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/seccomp.c:29:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      kernel/irq_work.o
13 warnings generated.
  CC      kernel/cpu_pm.o
13 warnings generated.
  CC      fs/pnode.o
  CC      lib/kobject_uevent.o
In file included from ../kernel/irq_work.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/irq_work.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/irq_work.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq_work.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq_work.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/irq_work.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq_work.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq_work.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/irq_work.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/splice.o
  CC      kernel/jump_label.o
In file included from ../lib/kobject_uevent.c:23:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../lib/kobject_uevent.c:23:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../lib/kobject_uevent.c:23:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
  CC      fs/sync.o
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/kobject_uevent.c:23:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/kobject_uevent.c:23:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/kobject_uevent.c:23:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/kobject_uevent.c:23:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/kobject_uevent.c:23:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/kobject_uevent.c:23:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/splice.c:21:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/splice.c:21:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/splice.c:21:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/splice.c:21:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/splice.c:21:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:1213:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
 warning        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
s#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count) generated.

                                         ~~~~~~~~~~ ^
In file included from ../fs/splice.c:21:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/splice.c:21:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/splice.c:21:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/splice.c:21:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/logic_pio.o
In file included from ../fs/sync.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/sync.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/sync.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/sync.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/sync.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/sync.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/sync.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/sync.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/sync.c:6:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      kernel/context_tracking.o
13 warnings generated.
In file included from ../lib/logic_pio.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../lib/logic_pio.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../lib/logic_pio.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/logic_pio.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/logic_pio.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/logic_pio.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/logic_pio.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/logic_pio.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
  CC      kernel/iomem.o
In file included from ../lib/logic_pio.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/utimes.o
In file included from ../kernel/context_tracking.c:23:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/context_tracking.c:23:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/context_tracking.c:23:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/context_tracking.c:23:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/context_tracking.c:23:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/context_tracking.c:23:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/context_tracking.c:23:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/context_tracking.c:23:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/context_tracking.c:23:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      lib/maple_tree.o
13 warnings generated.
In file included from ../kernel/iomem.c:4:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/iomem.c:4:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/iomem.c:4:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/iomem.c:4:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/iomem.c:4:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/iomem.c:4:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/iomem.c:4:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/iomem.c:4:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
  CC      kernel/rseq.o
In file included from ../kernel/iomem.c:4:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      lib/memcat_p.o
In file included from ../fs/utimes.c:6:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/utimes.c:6:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/utimes.c:6:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/utimes.c:6:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/utimes.c:6:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/utimes.c:6:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/utimes.c:6:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/utimes.c:6:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/utimes.c:6:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/d_path.o
  CC      lib/nmi_backtrace.o
In file included from ../kernel/rseq.c:13:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../kernel/rseq.c:13:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../kernel/rseq.c:13:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/rseq.c:13:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/rseq.c:13:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../kernel/rseq.c:13:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/rseq.c:13:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/rseq.c:13:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../kernel/rseq.c:13:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../lib/nmi_backtrace.c:18:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../lib/nmi_backtrace.c:18:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../lib/nmi_backtrace.c:18:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
13        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
 warnings generated.
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/nmi_backtrace.c:18:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/nmi_backtrace.c:18:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/nmi_backtrace.c:18:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/nmi_backtrace.c:18:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/nmi_backtrace.c:18:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/nmi_backtrace.c:18:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      kernel/built-in.a
  AS      arch/riscv/lib/clear_page.o
  CC      arch/riscv/lib/csum.o
In file included from ../fs/d_path.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/d_path.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/d_path.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/d_path.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/d_path.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/d_path.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/d_path.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/d_path.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/d_path.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      lib/objpool.o
13 warnings generated.
  CC      fs/stack.o
  CC      arch/riscv/lib/delay.o
  AS      arch/riscv/lib/memcpy.o
  CC      lib/plist.o
  AS      arch/riscv/lib/memmove.o
  CC      lib/radix-tree.o
  CC      lib/ratelimit.o
  AS      arch/riscv/lib/memset.o
  CC      fs/fs_struct.o
  AS      arch/riscv/lib/strcmp.o
  AS      arch/riscv/lib/strlen.o
  CC      lib/rbtree.o
  AS      arch/riscv/lib/strncmp.o
  AS      arch/riscv/lib/tishift.o
  AR      arch/riscv/lib/built-in.a
  AR      arch/riscv/lib/lib.a
  AR      drivers/cache/built-in.a
  CC      drivers/irqchip/irqchip.o
  CC      lib/seq_buf.o
  CC      fs/statfs.o
  CC      drivers/irqchip/irq-riscv-intc.o
In file included from ../drivers/irqchip/irqchip.c:14:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136  CC      lib/siphash.o
:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/irqchip/irqchip.c:14:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/irqchip/irqchip.c:14:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irqchip.c:14:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irqchip.c:14:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irqchip.c:14:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irqchip.c:14:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irqchip.c:14:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irqchip.c:14:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/statfs.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/statfs.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/statfs.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/statfs.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/statfs.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/statfs.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/statfs.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/statfs.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/statfs.c:2:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/irqchip/irq-riscv-aplic-main.o
13 warnings generated.
  CC      fs/fs_pin.o
In file included from ../drivers/irqchip/irq-riscv-intc.c:13:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/irqchip/irq-riscv-intc.c:13:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/irqchip/irq-riscv-intc.c:13:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-intc.c:13:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-intc.c:13:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-intc.c:13:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-intc.c:13:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-intc.c:13:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-intc.c:13:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/string.o
13 warnings generated.
  CC      drivers/irqchip/irq-riscv-aplic-direct.o
  CC      lib/timerqueue.o
  CC      lib/union_find.o
In file included from ../drivers/irqchip/irq-riscv-aplic-main.c:13:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/irqchip/irq-riscv-aplic-main.c:13:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/irqchip/irq-riscv-aplic-main.c:13:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-main.c:13:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-main.c:13:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-main.c:13:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-main.c:13:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-main.c:13:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-main.c:13:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      fs/nsfs.o
  CC      lib/vsprintf.o
13 warnings generated.
  CC      drivers/irqchip/irq-riscv-aplic-msi.o
In file included from ../drivers/irqchip/irq-riscv-aplic-direct.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/irqchip/irq-riscv-aplic-direct.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/irqchip/irq-riscv-aplic-direct.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-direct.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-direct.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-direct.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-direct.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-direct.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-direct.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/irqchip/irq-riscv-imsic-state.o
In file included from ../fs/nsfs.c:3:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/nsfs.c:3:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/nsfs.c:3:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/nsfs.c:3:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/nsfs.c:3:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/nsfs.c:3:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/nsfs.c:3:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/nsfs.c:3:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/nsfs.c:3:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../lib/vsprintf.c:36:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../lib/vsprintf.c:36:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../lib/vsprintf.c:36:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/vsprintf.c:36:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/vsprintf.c:36:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/vsprintf.c:36:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/vsprintf.c:36:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/vsprintf.c:36:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/vsprintf.c:36:
In file included from ../include/linux/rtc.h:17:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-msi.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/irqchip/irq-riscv-aplic-msi.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/irqchip/irq-riscv-aplic-msi.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-msi.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-msi.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-msi.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-msi.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-msi.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-aplic-msi.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/fs_types.o
13 warnings generated.
  CC      drivers/irqchip/irq-riscv-imsic-early.o
In file included from ../drivers/irqchip/irq-riscv-imsic-state.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/irqchip/irq-riscv-imsic-state.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/irqchip/irq-riscv-imsic-state.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-state.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-state.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-state.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-state.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-state.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-state.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/irqchip/irq-riscv-imsic-platform.o
  CC      fs/fs_context.o
In file included from ../drivers/irqchip/irq-riscv-imsic-early.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/irqchip/irq-riscv-imsic-early.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/irqchip/irq-riscv-imsic-early.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-early.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-early.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-early.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-early.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-early.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-early.c:10:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/irqchip/irq-sifive-plic.o
13 warnings generated.
  CC      lib/win_minmax.o
In file included from ../drivers/irqchip/irq-riscv-imsic-platform.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/irqchip/irq-riscv-imsic-platform.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/irqchip/irq-riscv-imsic-platform.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-platform.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-platform.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-platform.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-platform.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-platform.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-riscv-imsic-platform.c:11:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/fs_context.c:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/fs_context.c:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/fs_context.c:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/fs_context.c:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/fs_context.c:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/fs_context.c:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/fs_context.c:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/fs_context.c:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/fs_context.c:11:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      lib/xarray.o
In file included from ../drivers/irqchip/irq-sifive-plic.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/irqchip/irq-sifive-plic.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/irqchip/irq-sifive-plic.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-sifive-plic.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-sifive-plic.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-sifive-plic.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-sifive-plic.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-sifive-plic.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/irqchip/irq-sifive-plic.c:9:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      lib/lockref.o
  CC      fs/fs_parser.o
13 warnings generated.
  AR      drivers/irqchip/built-in.a
  CC      lib/bcd.o
  AR      drivers/bus/mhi/built-in.a
  CC      drivers/bus/simple-pm-bus.o
  CC      lib/sort.o
  CC      lib/parser.o
  CC      lib/debug_locks.o
In file included from ../fs/fs_parser.c:9:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/fs_parser.c:9:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/fs_parser.c:9:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/fs_parser.c:9:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/fs_parser.c:9:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/fs_parser.c:9:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/fs_parser.c:9:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/fs_parser.c:9:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/fs_parser.c:9:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/random32.o
  CC      lib/bust_spinlocks.o
13 warnings generated.
  CC      fs/fsopen.o
  AR      drivers/bus/built-in.a
  AR      drivers/pwm/built-in.a
  AR      drivers/leds/blink/built-in.a
  AR      drivers/leds/simple/built-in.a
  AR      drivers/leds/built-in.a
  AR      drivers/pci/controller/dwc/built-in.a
  AR      drivers/pci/controller/mobiveil/built-in.a
  AR      drivers/pci/controller/plda/built-in.a
  AR      drivers/pci/controller/built-in.a
  AR      drivers/pci/switch/built-in.a
  CC      drivers/pci/of.o
  CC      lib/kasprintf.o
In file included from ../lib/bust_spinlocks.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../lib/bust_spinlocks.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../lib/bust_spinlocks.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/bust_spinlocks.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/bust_spinlocks.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/bust_spinlocks.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/bust_spinlocks.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/bust_spinlocks.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/bust_spinlocks.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      lib/bitmap.o
  CC      lib/scatterlist.o
In file included from ../fs/fsopen.c:8:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/fsopen.c:8:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/fsopen.c:8:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/fsopen.c:8:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/fsopen.c:8:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/fsopen.c:8:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/fsopen.c:8:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/fsopen.c:8:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/fsopen.c:8:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/pci/of.c:12:
In file included from ../include/linux/pci.h:38:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/pci/of.c:12:
In file included from ../include/linux/pci.h:38:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/pci/of.c:12:
In file included from ../include/linux/pci.h:38:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/pci/of.c:12:
In file included from ../include/linux/pci.h:38:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/pci/of.c:12:
In file included from ../include/linux/pci.h:38:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/pci/of.c:12:
In file included from ../include/linux/pci.h:38:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/pci/of.c:12:
In file included from ../include/linux/pci.h:38:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/pci/of.c:12:
In file included from ../include/linux/pci.h:38:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/pci/of.c:12:
In file included from ../include/linux/pci.h:38:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/init.o
13 warnings generated.
  AR      drivers/pci/built-in.a
  CC      drivers/video/console/dummycon.o
In file included from ../lib/scatterlist.c:9:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../lib/scatterlist.c:9:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../lib/scatterlist.c:9:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/scatterlist.c:9:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/scatterlist.c:9:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/scatterlist.c:9:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/scatterlist.c:9:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/scatterlist.c:9:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/scatterlist.c:9:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/list_sort.o
  CC      lib/uuid.o
13 warnings generated.
In file included from   CC      lib/iov_iter.o
../fs/init.c:13:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/init.c:13:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/init.c:13:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/init.c:13:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/init.c:13:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/init.c:13:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/init.c:13:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/init.c:13:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:In file included from ../drivers/video/console/dummycon.c:12:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
20:
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]

        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
        outsl(addr, buffer, count);In file included from ../drivers/video/console/dummycon.c:12:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^

In file included from         ^~~~~~~~~~~~~~~~~~~~~~~~~~../drivers/video/console/dummycon.c:12:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^

../arch/riscv/include/asm/io.h:120:55: note: ../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
expanded from macro 'outsl'        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^

#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/video/console/dummycon.c:12:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/video/console/dummycon.c:12:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/video/console/dummycon.c:12:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/video/console/dummycon.c:12:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/video/console/dummycon.c:12:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/init.c:13:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/video/console/dummycon.c:12:
In file included from ../include/linux/vt_kern.h:12:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      lib/clz_ctz.o
  AR      drivers/video/console/built-in.a
  AR      drivers/video/backlight/built-in.a
  AR      drivers/video/fbdev/core/built-in.a
13 warnings generated.
  CC      fs/kernel_read_file.o
  AR      drivers/video/fbdev/omap/built-in.a
  CC      lib/bsearch.o
  AR      drivers/video/fbdev/omap2/omapfb/dss/built-in.a
  AR      drivers/video/fbdev/omap2/omapfb/displays/built-in.a
  AR      drivers/video/fbdev/omap2/omapfb/built-in.a
  AR      drivers/video/fbdev/omap2/built-in.a
  AR      drivers/video/fbdev/built-in.a
  AR      drivers/video/built-in.a
  AR      drivers/idle/built-in.a
In file included from ../lib/bsearch.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../lib/bsearch.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../lib/bsearch.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/bsearch.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/bsearch.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/bsearch.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/bsearch.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/bsearch.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/bsearch.c:11:
In file included from ../include/linux/kprobes.h:28:
In file included from ../include/linux/ftrace.h:10:
In file included from ../include/linux/trace_recursion.h:5:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      drivers/char/ipmi/built-in.a
  AR      drivers/amba/built-in.a
In file included from ../lib/iov_iter.c:3:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../lib/iov_iter.c:3:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../lib/iov_iter.c:3:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/iov_iter.c:3:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/iov_iter.c:3:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/iov_iter.c:3:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/iov_iter.c:3:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/iov_iter.c:3:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/iov_iter.c:3:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      drivers/clk/actions/built-in.a
  AR      drivers/clk/analogbits/built-in.a
In file included from ../fs/kernel_read_file.c:5:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/kernel_read_file.c:5:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/kernel_read_file.c:5:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernel_read_file.c:5:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernel_read_file.c:5:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from   AR      drivers/clk/bcm/built-in.a
../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/kernel_read_file.c:5:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/kernel_read_file.c:5:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/kernel_read_file.c:5:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/kernel_read_file.c:5:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      drivers/clk/imgtec/built-in.a
13 warnings generated.
  AR      drivers/clk/imx/built-in.a
  AR      drivers/soc/apple/built-in.a
  AR      drivers/soc/aspeed/built-in.a
  AR      drivers/clk/ingenic/built-in.a
13 warnings generated.
  AR      drivers/clk/mediatek/built-in.a
  AR      drivers/soc/bcm/built-in.a
  CC      fs/mnt_idmapping.o
  AR      drivers/clk/microchip/built-in.a
  AR      drivers/soc/fsl/built-in.a
  AR      drivers/clk/mstar/built-in.a
  AR      drivers/clk/mvebu/built-in.a
  AR      drivers/soc/fujitsu/built-in.a
  AR      drivers/soc/hisilicon/built-in.a
  AR      drivers/clk/ralink/built-in.a
  AR      drivers/soc/imx/built-in.a
  AR      drivers/clk/renesas/built-in.a
  AR      drivers/soc/ixp4xx/built-in.a
  AR      drivers/clk/socfpga/built-in.a
  AR      drivers/clk/sophgo/built-in.a
  AR      drivers/soc/loongson/built-in.a
  AR      drivers/clk/sprd/built-in.a
  AR      drivers/soc/mediatek/built-in.a
  AR      drivers/clk/starfive/built-in.a
  AR      drivers/soc/microchip/built-in.a
  AR      drivers/clk/sunxi-ng/built-in.a
  AR      drivers/soc/nuvoton/built-in.a
  AR      drivers/clk/ti/built-in.a
  AR      drivers/soc/pxa/built-in.a
  AR      drivers/soc/amlogic/built-in.a
  AR      drivers/clk/versatile/built-in.a
  AR      drivers/soc/qcom/built-in.a
  AR      drivers/clk/xilinx/built-in.a
  CC      drivers/clk/clk-devres.o
  AR      drivers/soc/renesas/built-in.a
  AR      drivers/soc/rockchip/built-in.a
  AR      drivers/soc/sunxi/built-in.a
  AR      drivers/soc/ti/built-in.a
13 warnings generated.
  CC      lib/find_bit.o
  AR      drivers/soc/versatile/built-in.a
  AR      drivers/soc/xilinx/built-in.a
  AR      drivers/soc/built-in.a
  CC      fs/remap_range.o
  AR      drivers/pmdomain/actions/built-in.a
  AR      drivers/pmdomain/amlogic/built-in.a
  AR      drivers/pmdomain/apple/built-in.a
  AR      drivers/pmdomain/arm/built-in.a
  AR      drivers/pmdomain/bcm/built-in.a
  AR      drivers/pmdomain/imx/built-in.a
  AR      drivers/pmdomain/mediatek/built-in.a
  AR      drivers/pmdomain/qcom/built-in.a
  CC      lib/llist.o
  AR      drivers/pmdomain/renesas/built-in.a
  AR      drivers/pmdomain/rockchip/built-in.a
  AR      drivers/pmdomain/samsung/built-in.a
  AR      drivers/pmdomain/st/built-in.a
  AR      drivers/pmdomain/starfive/built-in.a
  AR      drivers/pmdomain/sunxi/built-in.a
  AR      drivers/pmdomain/tegra/built-in.a
  CC      lib/lwq.o
  AR      drivers/pmdomain/ti/built-in.a
  AR      drivers/pmdomain/xilinx/built-in.a
  CC      drivers/pmdomain/core.o
  CC      drivers/clk/clk-bulk.o
  CC      lib/memweight.o
In file included from ../fs/remap_range.c:9:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/remap_range.c:9:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/remap_range.c:9:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/remap_range.c:9:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/remap_range.c:9:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/remap_range.c:9:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/remap_range.c:9:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/remap_range.c:9:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/remap_range.c:9:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/kfifo.o
In file included from ../drivers/pmdomain/core.c:11:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/pmdomain/core.c:11:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/pmdomain/core.c:11:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/pmdomain/core.c:11:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/pmdomain/core.c:11:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/pmdomain/core.c:11:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/pmdomain/core.c:11:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/pmdomain/core.c:11:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/pmdomain/core.c:11:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/pidfs.o
  CC      drivers/clk/clkdev.o
In file included from ../lib/kfifo.c:8:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../lib/kfifo.c:8:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../lib/kfifo.c:8:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/kfifo.c:8:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/kfifo.c:8:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/kfifo.c:8:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/kfifo.c:8:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/kfifo.c:8:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/kfifo.c:8:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      lib/percpu-refcount.o
In file included from ../fs/pidfs.c:13:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/pidfs.c:13:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/pidfs.c:13:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/pidfs.c:13:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/pidfs.c:13:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/pidfs.c:13:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/pidfs.c:13:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/pidfs.c:13:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/pidfs.c:13:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/pmdomain/governor.o
  CC      drivers/clk/clk.o
13 warnings generated.
  CC      fs/buffer.o
  CC      lib/rhashtable.o
  AR      drivers/pmdomain/built-in.a
  CC      drivers/virtio/virtio.o
In file included from ../fs/buffer.c:24:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/buffer.c:24:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/buffer.c:24:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/buffer.c:24:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/buffer.c:24:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/buffer.c:24:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/buffer.c:24:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/buffer.c:24:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/buffer.c:24:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/virtio/virtio.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/virtio/virtio.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/virtio/virtio_ring.o
  CC      drivers/clk/clk-divider.o
  CC      lib/base64.o
  CC      lib/once.o
13 warnings generated.
  CC      fs/mpage.o
In file included from ../drivers/virtio/virtio_ring.c:6:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/virtio/virtio_ring.c:6:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/virtio/virtio_ring.c:6:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_ring.c:6:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_ring.c:6:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_ring.c:6:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_ring.c:6:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_ring.c:6:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_ring.c:6:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-divider.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/clk/clk-divider.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/clk/clk-divider.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-divider.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-divider.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-divider.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-divider.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-divider.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-divider.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/refcount.o
13 warnings generated.
  CC      drivers/clk/clk-fixed-factor.o
  CC      lib/rcuref.o
In file included from ../fs/mpage.c:21:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/mpage.c:21:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/mpage.c:21:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/mpage.c:21:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/mpage.c:21:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/mpage.c:21:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/mpage.c:21:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/mpage.c:21:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/mpage.c:21:
In file included from ../include/linux/bio.h:10:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/virtio/virtio_anchor.o
  CC      lib/usercopy.o
13 warnings generated.
  CC      drivers/clk/clk-fixed-rate.o
  CC      fs/proc_namespace.o
  CC      lib/errseq.o
In file included from ../drivers/virtio/virtio_anchor.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/virtio/virtio_anchor.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/virtio/virtio_anchor.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_anchor.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_anchor.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_anchor.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_anchor.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_anchor.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_anchor.c:2:
In file included from ../include/linux/virtio.h:7:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/virtio/virtio_mmio.o
  CC      lib/bucket_locks.o
In file included from ../drivers/clk/clk-fixed-rate.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/clk/clk-fixed-rate.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/clk/clk-fixed-rate.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-fixed-rate.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-fixed-rate.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-fixed-rate.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-fixed-rate.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-fixed-rate.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-fixed-rate.c:12:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/clk/clk-gate.o
In file included from ../fs/proc_namespace.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/proc_namespace.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/proc_namespace.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc_namespace.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc_namespace.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/proc_namespace.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc_namespace.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc_namespace.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/proc_namespace.c:12:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/anon_inodes.o
  CC      lib/generic-radix-tree.o
In file included from ../drivers/virtio/virtio_mmio.c:58:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/virtio/virtio_mmio.c:58:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/virtio/virtio_mmio.c:58:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_mmio.c:58:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_mmio.c:58:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_mmio.c:58:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_mmio.c:58:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_mmio.c:58:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/virtio/virtio_mmio.c:58:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-gate.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/clk/clk-gate.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/clk/clk-gate.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-gate.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-gate.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-gate.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-gate.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-gate.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-gate.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/clk/clk-multiplier.o
13 warnings generated.
  AR      drivers/virtio/built-in.a
  CC      drivers/tty/vt/vt_ioctl.o
  CC      lib/bitmap-str.o
In file included from ../fs/anon_inodes.c:23:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/anon_inodes.c:23:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/anon_inodes.c:23:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/anon_inodes.c:23:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/anon_inodes.c:23:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/anon_inodes.c:23:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/anon_inodes.c:23:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/anon_inodes.c:23:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/anon_inodes.c:23:
In file included from ../include/linux/pseudo_fs.h:4:
In file included from ../include/linux/fs_context.h:14:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
In file included from ../drivers/clk/clk-multiplier.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/clk/clk-multiplier.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/clk/clk-multiplier.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-multiplier.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-multiplier.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-multiplier.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-multiplier.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-multiplier.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-multiplier.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      fs/locks.o
13 warnings generated.
  CC      drivers/clk/clk-mux.o
In file included from ../drivers/tty/vt/vt_ioctl.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/vt/vt_ioctl.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/vt/vt_ioctl.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vt_ioctl.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vt_ioctl.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vt_ioctl.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vt_ioctl.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vt_ioctl.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vt_ioctl.c:15:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/string_helpers.o
13 warnings generated.
  CC      drivers/tty/vt/vc_screen.o
In file included from ../drivers/clk/clk-mux.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/clk/clk-mux.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/clk/clk-mux.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-mux.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-mux.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-mux.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-mux.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-mux.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-mux.c:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../fs/locks.c:57:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/locks.c:57:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/locks.c:57:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/locks.c:57:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/locks.c:57:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/locks.c:57:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/locks.c:57:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/locks.c:57:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/locks.c:57:
In file included from ../include/linux/security.h:35:
In file included from ../include/linux/bpf.h:31:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/clk/clk-composite.o
  CC      lib/hexdump.o
In file included from ../drivers/tty/vt/vc_screen.c:33:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/vt/vc_screen.c:33:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/vt/vc_screen.c:33:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vc_screen.c:33:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vc_screen.c:33:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vc_screen.c:33:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vc_screen.c:33:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vc_screen.c:33:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vc_screen.c:33:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/kstrtox.o
13 warnings generated.
  CC      fs/binfmt_script.o
  CC      drivers/clk/clk-fractional-divider.o
13 warnings generated.
  CC      drivers/tty/vt/selection.o
  CC      lib/iomap_copy.o
  CC      fs/binfmt_elf_fdpic.o
In file included from ../drivers/clk/clk-fractional-divider.c:43:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/clk/clk-fractional-divider.c:43:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/clk/clk-fractional-divider.c:43:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-fractional-divider.c:43:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-fractional-divider.c:43:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-fractional-divider.c:43:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-fractional-divider.c:43:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-fractional-divider.c:43:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clk/clk-fractional-divider.c:43:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/clk/clk-gpio.o
In file included from ../drivers/tty/vt/selection.c:16:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
In file included from ../lib/iomap_copy.c:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
                                                        ~~~~~~~~~~ ^../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^

../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../lib/iomap_copy.c:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/vt/selection.c:16:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:In file included from 35:../lib/iomap_copy.c51::7 :
note: In file included from expanded from macro '__le32_to_cpu'../include/linux/io.h
:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))33
:                                                  ^ 
warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/selection.c:16:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33:../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
 warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]In file included from ../lib/iomap_copy.c:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^

        __raw_writeb(value, PCI_IOBASE + addr);In file included from ../lib/iomap_copy.c:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^

                            ~~~~~~~~~~ ^In file included from ../lib/iomap_copy.c:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^

In file included from ../lib/iomap_copy.c:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/iomap_copy.c:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/selection.c:16:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:In file included from 2../lib/iomap_copy.c:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/selection.c:16:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/selection.c:16:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/selection.c:16:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/selection.c:16:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/selection.c:16:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h13 warnings generated.
:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/devres.o
13 warnings generated.
  CC      drivers/tty/vt/keyboard.o
In file included from ../fs/binfmt_elf_fdpic.c:26:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/binfmt_elf_fdpic.c:26:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/binfmt_elf_fdpic.c:26:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/binfmt_elf_fdpic.c:26:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/binfmt_elf_fdpic.c:26:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/binfmt_elf_fdpic.c:26:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/binfmt_elf_fdpic.c:26:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/binfmt_elf_fdpic.c:26:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/binfmt_elf_fdpic.c:26:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      drivers/clk/clk-conf.o
In file included from ../lib/devres.c:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../lib/devres.c:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../lib/devres.c:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/devres.c:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/devres.c:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/devres.c:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/devres.c:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/devres.c:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/devres.c:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      lib/hweight.o
  CC      lib/bitrev.o
13 warnings generated.
In file included from ../drivers/tty/vt/keyboard.c:33:
In file included from ../include/linux/kbd_kern.h:5:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/vt/keyboard.c:33:
In file included from ../include/linux/kbd_kern.h:5:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/vt/keyboard.c:33:
In file included from ../include/linux/kbd_kern.h:5:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/keyboard.c:33:
In file included from ../include/linux/kbd_kern.h:5:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/keyboard.c:33:
In file included from ../include/linux/kbd_kern.h:5:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/keyboard.c:33:
In file included from ../include/linux/kbd_kern.h:5:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/keyboard.c:33:
In file included from ../include/linux/kbd_kern.h:5:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/keyboard.c:33:
In file included from ../include/linux/kbd_kern.h:5:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
  CC      fs/binfmt_flat.o
In file included from ../drivers/tty/vt/keyboard.c:33:
In file included from ../include/linux/kbd_kern.h:5:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/tty/vt/vt.o
  AR      drivers/clk/built-in.a
  HOSTCC  lib/gen_crc32table
  CC      lib/xxhash.o
  CC      lib/percpu_counter.o
  CC      fs/drop_caches.o
In file included from ../drivers/tty/vt/vt.c:77:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/vt/vt.c:77:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/vt/vt.c:77:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vt.c:77:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vt.c:77:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vt.c:77:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vt.c:77:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vt.c:77:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/vt.c:77:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/syscall.o
  CC      lib/errname.o
In file included from ../fs/drop_caches.c:6:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../fs/drop_caches.c:6:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from   CC      lib/checksum.o
../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../fs/drop_caches.c:6:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/drop_caches.c:6:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/drop_caches.c:6:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../fs/drop_caches.c:6:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/drop_caches.c:6:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/drop_caches.c:6:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../fs/drop_caches.c:6:
In file included from ../include/linux/pagemap.h:11:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      fs/sysctls.o
  CC      lib/strncpy_from_user.o
  AR      fs/built-in.a
  AR      sound/built-in.a
  AR      virt/lib/built-in.a
  AR      virt/built-in.a
  CC      lib/strnlen_user.o
  CC      lib/sg_pool.o
13 warnings generated.
  COPY    drivers/tty/vt/defkeymap.c
  CC      drivers/tty/vt/consolemap.o
  CC      lib/sbitmap.o
In file included from ../lib/sg_pool.c:3:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../lib/sg_pool.c:3:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../lib/sg_pool.c:3:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/sg_pool.c:3:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/sg_pool.c:3:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/sg_pool.c:3:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/sg_pool.c:3:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/sg_pool.c:3:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/sg_pool.c:3:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      lib/group_cpus.o
13 warnings generated.
  CC      lib/devmem_is_allowed.o
In file included from ../drivers/tty/vt/consolemap.c:34:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/vt/consolemap.c:34:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/vt/consolemap.c:34:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/consolemap.c:34:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/consolemap.c:34:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/consolemap.c:34:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/consolemap.c:34:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/consolemap.c:34:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/vt/consolemap.c:34:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  HOSTCC  drivers/tty/vt/conmakehash
  CC      drivers/tty/vt/defkeymap.o
In file included from ../lib/devmem_is_allowed.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../lib/devmem_is_allowed.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../lib/devmem_is_allowed.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/devmem_is_allowed.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/devmem_is_allowed.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../lib/devmem_is_allowed.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/devmem_is_allowed.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/devmem_is_allowed.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../lib/devmem_is_allowed.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  AR      lib/lib.a
  GEN     lib/crc32table.h
  CONMK   drivers/tty/vt/consolemap_deftbl.c
  CC      lib/crc32.o
  CC      drivers/tty/vt/consolemap_deftbl.o
  AR      drivers/tty/vt/built-in.a
  AR      drivers/char/agp/built-in.a
  AR      drivers/tty/ipwireless/built-in.a
  CC      drivers/char/mem.o
  CC      drivers/tty/serial/8250/8250_core.o
  CC      drivers/tty/tty_io.o
In file included from ../drivers/tty/tty_io.c:75:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/tty_io.c:75:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/tty_io.c:75:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_io.c:75:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_io.c:75:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_io.c:75:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_io.c:75:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_io.c:75:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_io.c:75:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/char/mem.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/char/mem.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/char/mem.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/char/mem.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/char/mem.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/char/mem.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/char/mem.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/char/mem.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/char/mem.c:19:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_core.c:25:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/serial/8250/8250_core.c:25:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/serial/8250/8250_core.c:25:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_core.c:25:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_core.c:25:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_core.c:25:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_core.c:25:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_core.c:25:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_core.c:25:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      lib/built-in.a
  CC      drivers/tty/n_tty.o
13 warnings generated.
  CC      drivers/char/random.o
13 warnings generated.
  CC      drivers/tty/serial/8250/8250_platform.o
13 warnings generated.
  CC      drivers/tty/serial/8250/8250_port.o
In file included from ../drivers/tty/n_tty.c:46:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/n_tty.c:46:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/n_tty.c:46:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/n_tty.c:46:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/n_tty.c:46:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/n_tty.c:46:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/n_tty.c:46:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/n_tty.c:46:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/n_tty.c:46:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/char/random.c:39:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/char/random.c:39:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/char/random.c:39:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/char/random.c:39:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/char/random.c:39:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/char/random.c:39:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/char/random.c:39:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/char/random.c:39:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/char/random.c:39:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_platform.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/serial/8250/8250_platform.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/serial/8250/8250_platform.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_platform.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_platform.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_platform.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_platform.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_platform.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_platform.c:13:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
In file included from ../drivers/tty/serial/8250/8250_port.c:18:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/serial/8250/8250_port.c:18:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/serial/8250/8250_port.c:18:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_port.c:18:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_port.c:18:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_port.c:18:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_port.c:18:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_port.c:18:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_port.c:18:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      drivers/tty/serial/8250/8250_early.o
13 warnings generated.
  CC      drivers/tty/tty_ioctl.o
13 warnings generated.
  CC      drivers/char/misc.o
In file included from ../drivers/tty/serial/8250/8250_early.c:26:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/serial/8250/8250_early.c:26:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/serial/8250/8250_early.c:26:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_early.c:26:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_early.c:26:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_early.c:26:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_early.c:26:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_early.c:26:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_early.c:26:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ioctl.c:17:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/tty_ioctl.c:17:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/tty_ioctl.c:17:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ioctl.c:17:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ioctl.c:17:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ioctl.c:17:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ioctl.c:17:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ioctl.c:17:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ioctl.c:17:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
13 warnings generated.
  CC      drivers/tty/serial/8250/8250_of.o
  CC      drivers/tty/tty_ldisc.o
13 warnings generated.
  CC      drivers/tty/tty_buffer.o
In file included from ../drivers/char/misc.c:50:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/char/misc.c:50:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/char/misc.c:50:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/char/misc.c:50:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/char/misc.c:50:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/char/misc.c:50:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/char/misc.c:50:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/char/misc.c:50:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/char/misc.c:50:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  AR      drivers/char/built-in.a
  AR      drivers/iommu/amd/built-in.a
  AR      drivers/iommu/intel/built-in.a
  AR      drivers/iommu/arm/arm-smmu/built-in.a
In file included from ../drivers/tty/tty_ldisc.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/tty_ldisc.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/tty_ldisc.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53:   AR      drivers/iommu/arm/arm-smmu-v3/built-in.a
note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ldisc.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ldisc.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ldisc.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ldisc.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ldisc.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ldisc.c:6:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      drivers/iommu/arm/built-in.a
  AR      drivers/iommu/iommufd/built-in.a
  AR      drivers/iommu/built-in.a
In file included from ../drivers/tty/serial/8250/8250_of.c:13:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/serial/8250/8250_of.c:13:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/serial/8250/8250_of.c:13:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
  AR      drivers/gpu/host1x/built-in.a
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_of.c:13:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_of.c:13:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_of.c:13:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_of.c:13:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_of.c:13:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/8250/8250_of.c:13:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_buffer.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/tty_buffer.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/tty_buffer.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_buffer.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_buffer.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_buffer.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_buffer.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_buffer.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_buffer.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  AR      drivers/gpu/drm/tests/built-in.a
  AR      drivers/tty/serial/8250/built-in.a
  AR      drivers/gpu/drm/arm/built-in.a
  CC      drivers/tty/serial/serial_core.o
13 warnings generated.
  AR      drivers/gpu/drm/display/built-in.a
13 warnings generated.
  CC      drivers/tty/tty_port.o
  CC      drivers/tty/tty_mutex.o
  AR      drivers/gpu/drm/renesas/rcar-du/built-in.a
  AR      drivers/gpu/drm/renesas/rz-du/built-in.a
  AR      drivers/gpu/drm/renesas/built-in.a
  AR      drivers/gpu/drm/omapdrm/built-in.a
  AR      drivers/gpu/drm/tilcdc/built-in.a
  AR      drivers/gpu/drm/imx/built-in.a
  AR      drivers/gpu/drm/i2c/built-in.a
  AR      drivers/gpu/drm/panel/built-in.a
  AR      drivers/gpu/drm/bridge/analogix/built-in.a
  AR      drivers/gpu/drm/bridge/cadence/built-in.a
  AR      drivers/gpu/drm/bridge/imx/built-in.a
  AR      drivers/gpu/drm/bridge/synopsys/built-in.a
  AR      drivers/gpu/drm/bridge/built-in.a
  AR      drivers/gpu/drm/hisilicon/built-in.a
  AR      drivers/gpu/drm/mxsfb/built-in.a
  AR      drivers/gpu/drm/tiny/built-in.a
  AR      drivers/gpu/drm/xlnx/built-in.a
  AR      drivers/gpu/drm/gud/built-in.a
  AR      drivers/gpu/drm/solomon/built-in.a
  AR      drivers/gpu/drm/built-in.a
  AR      drivers/gpu/vga/built-in.a
In file included from ../drivers/tty/tty_port.c:8:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/tty_port.c:8:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/tty_port.c:8:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_port.c:8:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_port.c:8:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_port.c:8:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_port.c:8:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_port.c:8:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
  AR      drivers/gpu/built-in.a
In file included from ../drivers/tty/tty_port.c:8:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_core.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/serial/serial_core.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/serial/serial_core.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_core.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_core.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_core.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_core.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_core.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
  CC      drivers/base/power/sysfs.o
In file included from ../drivers/tty/serial/serial_core.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_mutex.c:2:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/tty_mutex.c:2:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/tty_mutex.c:2:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_mutex.c:2:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_mutex.c:2:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_mutex.c:2:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_mutex.c:2:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_mutex.c:2:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_mutex.c:2:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
13 warnings generated.
  CC      drivers/base/firmware_loader/builtin/main.o
  CC      drivers/tty/tty_ldsem.o
  AR      drivers/base/firmware_loader/builtin/built-in.a
  AR      drivers/base/firmware_loader/built-in.a
  CC      drivers/base/regmap/regmap.o
  CC      drivers/base/power/generic_ops.o
In file included from ../drivers/tty/tty_ldsem.c:31:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/tty_ldsem.c:31:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/tty_ldsem.c:31:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ldsem.c:31:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ldsem.c:31:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ldsem.c:31:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ldsem.c:31:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ldsem.c:31:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_ldsem.c:31:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/tty/tty_baudrate.o
13 warnings generated.
  CC      drivers/tty/serial/serial_base_bus.o
In file included from ../drivers/base/regmap/regmap.c:23:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/regmap/regmap.c:23:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/regmap/regmap.c:23:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regmap.c:23:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regmap.c:23:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regmap.c:23:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regmap.c:23:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regmap.c:23:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regmap.c:23:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      drivers/base/power/common.o
In file included from ../drivers/tty/tty_baudrate.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/tty_baudrate.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/tty_baudrate.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_baudrate.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_baudrate.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_baudrate.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_baudrate.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_baudrate.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_baudrate.c:9:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_base_bus.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/serial/serial_base_bus.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/serial/serial_base_bus.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_base_bus.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_base_bus.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_base_bus.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_base_bus.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_base_bus.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_base_bus.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
13 warnings generated.
  CC      drivers/tty/tty_jobctrl.o
  CC      drivers/base/regmap/regcache.o
13 warnings generated.
  CC      drivers/tty/serial/serial_ctrl.o
  CC      drivers/base/power/qos.o
In file included from ../drivers/base/regmap/regcache.c:15:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/regmap/regcache.c:15:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/regmap/regcache.c:15:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache.c:15:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache.c:15:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache.c:15:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache.c:15:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache.c:15:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache.c:15:
In file included from ../drivers/base/regmap/trace.h:11:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_ctrl.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/serial/serial_ctrl.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/serial/serial_ctrl.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_ctrl.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_ctrl.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_ctrl.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_ctrl.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_ctrl.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../drivers/tty/tty_jobctrl.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]

        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
                          ~~~~~~~~~~ ^#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)

                                           ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/tty_jobctrl.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/tty_jobctrl.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_jobctrl.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_jobctrl.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_jobctrl.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_jobctrl.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: 13 warnings generated.
note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_jobctrl.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
In file included from         outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
../drivers/tty/serial/serial_ctrl.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/tty/tty_jobctrl.c:11:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      drivers/base/regmap/regcache-rbtree.o
13 warnings generated.
13 warnings generated.
  CC      drivers/base/regmap/regcache-flat.o
  CC      drivers/tty/serial/serial_port.o
In file included from ../drivers/base/power/qos.c:38:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/power/qos.c:38:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/power/qos.c:38:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/power/qos.c:38:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/power/qos.c:38:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/power/qos.c:38:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/power/qos.c:38:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/power/qos.c:38:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/power/qos.c:38:
In file included from ../include/trace/events/power.h:12:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/base/power/runtime.o
In file included from ../drivers/base/regmap/regcache-rbtree.c:15:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/regmap/regcache-rbtree.c:15:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/regmap/regcache-rbtree.c:15:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-rbtree.c:15:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-rbtree.c:15:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-rbtree.c:15:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-rbtree.c:15:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-rbtree.c:15:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-rbtree.c:15:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-flat.c:13:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/regmap/regcache-flat.c:13:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/regmap/regcache-flat.c:13:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-flat.c:13:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-flat.c:13:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-flat.c:13:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-flat.c:13:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-flat.c:13:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-flat.c:13:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
13 warnings generated.
  CC      drivers/base/power/wakeirq.o
  CC      drivers/base/regmap/regcache-maple.o
In file included from ../drivers/tty/serial/serial_port.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/serial/serial_port.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/serial/serial_port.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_port.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_port.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_port.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_port.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_port.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/serial_port.c:16:
In file included from ../include/linux/serial_core.h:13:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/tty/serial/earlycon.o
In file included from ../drivers/base/regmap/regcache-maple.c:14:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/regmap/regcache-maple.c:14:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/regmap/regcache-maple.c:14:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-maple.c:14:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-maple.c:14:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-maple.c:14:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-maple.c:14:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-maple.c:14:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regcache-maple.c:14:
In file included from ../drivers/base/regmap/internal.h:14:
In file included from ../include/linux/regmap.h:20:
In file included from ../include/linux/iopoll.h:14:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      drivers/base/power/main.o
In file included from ../drivers/base/power/wakeirq.cIn file included from ../drivers/tty/serial/earlycon.c:16:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
:4        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
:
In file included from         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
:        val = __raw_readb(PCI_IOBASE + addr);37:51: note: expanded from macro '__le16_to_cpu'

#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
                          ~~~~~~~~~~ ^
In file included from ../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
../drivers/tty/serial/earlycon.c        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));:16:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]

        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
                                                        ~~~~~~~~~~ ^#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^

../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/serial/earlycon.c:16:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:In file included from 585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
../drivers/base/power/wakeirq.c        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
:4:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:../include/asm-generic/io.h1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
:#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
In file included from ../drivers/base/power/wakeirq.c:4:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
In file included from ./arch/riscv/include/generated/asm/hardirq.h        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/earlycon.c:16:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'../include/asm-generic/io.h:744:2: warning: 
performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^

        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53:In file included from ../drivers/tty/serial/earlycon.c:16:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
         insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
note: #define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^

                                         ~~~~~~~~~~ ^
In file included from In file included from ../drivers/tty/serial/earlycon.c:16:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
../drivers/base/power/wakeirq.c        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
:#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)4:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
                                           ~~~~~~~~~~ ^

        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: In file included from note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
../drivers/tty/serial/earlycon.c:16:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:In file included from ../drivers/base/power/wakeirq.c:4:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
136        insl(addr, buffer, count);:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]

        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
        ^~~~~~~~~~~~~~~~~~~~~~~~~#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^

../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)In file included from 
                                         ~~~~~~~~~~ ^
../drivers/tty/serial/earlycon.c:16:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
In file included from ../drivers/base/power/wakeirq.c:4:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
../include/asm-generic/io.h        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
:#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'

#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/power/wakeirq.c:4:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/power/wakeirq.c:4:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/serial/earlycon.c:16:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
In file included from ../drivers/base/power/wakeirq.c:4:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      drivers/base/regmap/regmap-mmio.o
13 warnings generated.
  CC      drivers/base/power/wakeup.o
13 warnings generated.
  AR      drivers/tty/serial/built-in.a
In file included from ../drivers/base/regmap/regmap-mmio.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/regmap/regmap-mmio.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/regmap/regmap-mmio.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
  CC      drivers/tty/n_null.o
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regmap-mmio.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regmap-mmio.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regmap-mmio.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regmap-mmio.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regmap-mmio.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/regmap/regmap-mmio.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/base/power/main.c:28:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/power/main.c:28:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/power/main.c:28:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/power/main.c:28:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/power/main.c:28:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/power/main.c:28:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/power/main.c:28:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/power/main.c:28:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/power/main.c:28:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/base/power/wakeup.c:14:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/power/wakeup.c:14:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/power/wakeup.c:14:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/power/wakeup.c:14:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/power/wakeup.c:14:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/power/wakeup.c:14:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/power/wakeup.c:14:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/power/wakeup.c:14:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/power/wakeup.c:14:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  AR      drivers/base/regmap/built-in.a
  AR      drivers/base/test/built-in.a
  CC      drivers/base/component.o
In file included from ../drivers/tty/n_null.c:4:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/n_null.c:4:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/n_null.c:4:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/n_null.c:4:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/n_null.c:4:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/n_null.c:4:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/n_null.c:4:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/n_null.c:4:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/n_null.c:4:
In file included from ../include/linux/tty.h:11:
In file included from ../include/linux/tty_port.h:5:
In file included from ../include/linux/kfifo.h:40:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/tty/pty.o
13 warnings generated.
  CC      drivers/base/power/wakeup_stats.o
13 warnings generated.
  CC      drivers/base/power/clock_ops.o
  CC      drivers/base/core.o
In file included from ../drivers/tty/pty.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/tty/pty.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/tty/pty.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/pty.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/pty.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/tty/pty.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/pty.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/pty.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/tty/pty.c:12:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      drivers/base/bus.o
13 warnings generated.
  AR      drivers/tty/built-in.a
In file included from ../drivers/base/power/clock_ops.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/power/clock_ops.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/power/clock_ops.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/power/clock_ops.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/power/clock_ops.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/power/clock_ops.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/power/clock_ops.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/power/clock_ops.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/power/clock_ops.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      drivers/block/virtio_blk.o
13 warnings generated.
  AR      drivers/base/power/built-in.a
  CC      drivers/base/dd.o
In file included from ../drivers/base/core.c:12:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/core.c:12:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/core.c:12:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/core.c:12:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/core.c:12:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/core.c:12:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/core.c:12:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/core.c:12:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/core.c:12:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      drivers/misc/eeprom/built-in.a
  AR      drivers/misc/cb710/built-in.a
  AR      drivers/misc/ti-st/built-in.a
  AR      drivers/misc/lis3lv02d/built-in.a
In file included from ../drivers/block/virtio_blk.c:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/block/virtio_blk.c:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/block/virtio_blk.c:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/block/virtio_blk.c:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/block/virtio_blk.c:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/block/virtio_blk.c:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/block/virtio_blk.c:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/block/virtio_blk.c:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
  AR      drivers/misc/cardreader/built-in.a
In file included from ../drivers/block/virtio_blk.c:5:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      drivers/misc/keba/built-in.a
  AR      drivers/misc/built-in.a
  CC      drivers/base/syscore.o
In file included from ../drivers/base/dd.c:22:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/dd.c:22:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/dd.c:22:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/dd.c:22:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/dd.c:22:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/dd.c:22:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/dd.c:22:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/dd.c:22:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/dd.c:22:
In file included from ../include/linux/dma-map-ops.h:9:
In file included from ../include/linux/dma-mapping.h:11:
In file included from ../include/linux/scatterlist.h:9:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/base/driver.o
13 warnings generated.
  AR      drivers/block/built-in.a
  CC      drivers/mfd/syscon.o
In file included from ../drivers/base/syscore.c:11:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/syscore.c:11:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/syscore.c:11:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/syscore.c:11:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/syscore.c:11:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/syscore.c:11:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/syscore.c:11:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/syscore.c:11:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/syscore.c:11:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/base/class.o
In file included from ../drivers/mfd/syscon.c:15:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/mfd/syscon.c:15:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/mfd/syscon.c:15:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/mfd/syscon.c:15:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/mfd/syscon.c:15:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/mfd/syscon.c:15:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/mfd/syscon.c:15:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/mfd/syscon.c:15:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/mfd/syscon.c:15:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/base/platform.o
  AR      drivers/nfc/built-in.a
  CC      drivers/base/cpu.o
13 warnings generated.
  AR      drivers/mfd/built-in.a
  AR      drivers/dax/hmem/built-in.a
  AR      drivers/dax/built-in.a
  CC      drivers/base/firmware.o
In file included from ../drivers/base/class.c:19:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/class.c:19:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/class.c:19:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/class.c:19:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/class.c:19:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/class.c:19:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/class.c:19:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/class.c:19:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/class.c:19:
In file included from ../include/linux/blkdev.h:9:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/base/platform.c:15:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/platform.c:15:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/platform.c:15:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/platform.c:15:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/platform.c:15:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/platform.c:15:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/platform.c:15:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/platform.c:15:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/platform.c:15:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/base/cpu.c:20:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/cpu.c:20:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/cpu.c:20:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/cpu.c:20:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/cpu.c:20:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/cpu.c:20:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/cpu.c:20:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/cpu.c:20:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/cpu.c:20:
In file included from ../include/linux/tick.h:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/base/init.o
13 warnings generated.
  CC      drivers/base/map.o
  CC      drivers/base/devres.o
13 warnings generated.
  CC      drivers/base/attribute_container.o
  CC      drivers/base/transport_class.o
In file included from ../drivers/base/init.c:11:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/init.c:11:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/init.c:11:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/init.c:11:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/init.c:11:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/init.c:11:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/init.c:11:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/init.c:11:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/init.c:11:
In file included from ../include/linux/backing-dev.h:16:
In file included from ../include/linux/writeback.h:13:
In file included from ../include/linux/blk_types.h:10:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/base/topology.o
  CC      drivers/base/container.o
  AR      drivers/cxl/core/built-in.a
  AR      drivers/cxl/built-in.a
  AR      drivers/macintosh/built-in.a
  CC      drivers/base/property.o
  CC      drivers/base/cacheinfo.o
In file included from ../drivers/base/topology.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/topology.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/topology.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/topology.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/topology.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/topology.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/topology.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/topology.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/topology.c:14:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      drivers/base/swnode.o
13 warnings generated.
  CC      drivers/base/devtmpfs.o
In file included from ../drivers/base/property.c:16:
In file included from ../include/linux/phy.h:16:
In file included from ../include/linux/ethtool.h:18:
In file included from ../include/linux/if_ether.h:19:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/property.c:16:
In file included from ../include/linux/phy.h:16:
In file included from ../include/linux/ethtool.h:18:
In file included from ../include/linux/if_ether.h:19:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/property.c:16:
In file included from ../include/linux/phy.h:16:
In file included from ../include/linux/ethtool.h:18:
In file included from ../include/linux/if_ether.h:19:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/property.c:16:
In file included from ../include/linux/phy.h:16:
In file included from ../include/linux/ethtool.h:18:
In file included from ../include/linux/if_ether.h:19:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/property.c:16:
In file included from ../include/linux/phy.h:16:
In file included from ../include/linux/ethtool.h:18:
In file included from ../include/linux/if_ether.h:19:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/property.c:16:
In file included from ../include/linux/phy.h:16:
In file included from ../include/linux/ethtool.h:18:
In file included from ../include/linux/if_ether.h:19:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/property.c:16:
In file included from ../include/linux/phy.h:16:
In file included from ../include/linux/ethtool.h:18:
In file included from ../include/linux/if_ether.h:19:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/property.c:16:
In file included from ../include/linux/phy.h:16:
In file included from ../include/linux/ethtool.h:18:
In file included from ../include/linux/if_ether.h:19:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/property.c:16:
In file included from ../include/linux/phy.h:16:
In file included from ../include/linux/ethtool.h:18:
In file included from ../include/linux/if_ether.h:19:
In file included from ../include/linux/skbuff.h:17:
In file included from ../include/linux/bvec.h:10:
In file included from ../include/linux/highmem.h:12:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/base/platform-msi.o
In file included from ../drivers/base/devtmpfs.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:  CC      drivers/base/arch_topology.o
31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/devtmpfs.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/devtmpfs.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/devtmpfs.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/devtmpfs.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/devtmpfs.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/devtmpfs.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/devtmpfs.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/devtmpfs.c:19:
In file included from ../include/linux/syscalls.h:93:
In file included from ../include/trace/syscall.h:7:
In file included from ../include/linux/trace_events.h:9:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      drivers/scsi/built-in.a
  AR      drivers/nvme/common/built-in.a
  AR      drivers/nvme/host/built-in.a
  AR      drivers/nvme/target/built-in.a
  AR      drivers/nvme/built-in.a
  AR      drivers/net/phy/qcom/built-in.a
13 warnings generated.
  AR      drivers/net/phy/built-in.a
  AR      drivers/firewire/built-in.a
  AR      drivers/net/pse-pd/built-in.a
  AR      drivers/cdrom/built-in.a
  AR      drivers/net/mdio/built-in.a
  AR      drivers/auxdisplay/built-in.a
  AR      drivers/net/pcs/built-in.a
  AR      drivers/usb/built-in.a
  AR      drivers/net/built-in.a
  CC      drivers/input/input.o
  AR      drivers/i2c/algos/built-in.a
  AR      drivers/i2c/busses/built-in.a
  AR      drivers/i2c/muxes/built-in.a
  AR      drivers/i2c/built-in.a
  AR      drivers/i3c/built-in.a
In file included from ../drivers/base/platform-msi.c:12:
In file included from ../include/linux/msi.h:24:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/base/platform-msi.c:12:
In file included from ../include/linux/msi.h:24:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/base/platform-msi.c:12:
In file included from ../include/linux/msi.h:24:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/platform-msi.c:12:
In file included from ../include/linux/msi.h:24:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/platform-msi.c:12:
In file included from ../include/linux/msi.h:24:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/base/platform-msi.c:12:
In file included from ../include/linux/msi.h:24:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/platform-msi.c:12:
In file included from ../include/linux/msi.h:24:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/platform-msi.c:12:
In file included from ../include/linux/msi.h:24:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/base/platform-msi.c:12:
In file included from ../include/linux/msi.h:24:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      drivers/media/i2c/built-in.a
13 warnings generated.
  AR      drivers/media/tuners/built-in.a
  AR      drivers/ptp/built-in.a
  AR      drivers/media/rc/keymaps/built-in.a
  CC      drivers/power/reset/syscon-reboot.o
  AR      drivers/media/rc/built-in.a
  AR      drivers/base/built-in.a
  AR      drivers/media/common/b2c2/built-in.a
  AR      drivers/media/common/saa7146/built-in.a
  AR      drivers/media/common/siano/built-in.a
  AR      drivers/media/common/v4l2-tpg/built-in.a
  AR      drivers/media/common/videobuf2/built-in.a
  CC      drivers/input/input-compat.o
  AR      drivers/media/common/built-in.a
  AR      drivers/media/platform/allegro-dvt/built-in.a
In file included from ../drivers/power/reset/syscon-reboot.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/power/reset/syscon-reboot.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/power/reset/syscon-reboot.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/power/reset/syscon-reboot.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/power/reset/syscon-reboot.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/power/reset/syscon-reboot.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/power/reset/syscon-reboot.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/power/reset/syscon-reboot.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/power/reset/syscon-reboot.c:9:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      drivers/media/platform/amlogic/meson-ge2d/built-in.a
  AR      drivers/media/platform/amlogic/built-in.a
  AR      drivers/media/platform/amphion/built-in.a
  AR      drivers/media/platform/aspeed/built-in.a
  AR      drivers/media/platform/atmel/built-in.a
  AR      drivers/media/platform/broadcom/built-in.a
13 warnings generated.
  CC      drivers/power/reset/syscon-poweroff.o
  AR      drivers/media/platform/cadence/built-in.a
  AR      drivers/media/platform/chips-media/coda/built-in.a
  CC      drivers/input/input-mt.o
  AR      drivers/media/platform/chips-media/wave5/built-in.a
  CC      drivers/input/input-poller.o
  AR      drivers/media/platform/chips-media/built-in.a
  AR      drivers/media/platform/imagination/built-in.a
  AR      drivers/media/platform/intel/built-in.a
  AR      drivers/media/platform/marvell/built-in.a
  AR      drivers/media/platform/mediatek/jpeg/built-in.a
In file included from ../drivers/power/reset/syscon-poweroff.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/power/reset/syscon-poweroff.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/power/reset/syscon-poweroff.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/power/reset/syscon-poweroff.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/power/reset/syscon-poweroff.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/power/reset/syscon-poweroff.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/power/reset/syscon-poweroff.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/power/reset/syscon-poweroff.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/power/reset/syscon-poweroff.c:10:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      drivers/media/platform/mediatek/mdp/built-in.a
  AR      drivers/media/platform/mediatek/vcodec/common/built-in.a
  AR      drivers/media/platform/mediatek/vcodec/encoder/built-in.a
  AR      drivers/media/platform/mediatek/vcodec/decoder/built-in.a
  AR      drivers/media/platform/mediatek/vcodec/built-in.a
  AR      drivers/media/platform/mediatek/vpu/built-in.a
  AR      drivers/media/platform/mediatek/mdp3/built-in.a
  AR      drivers/media/platform/mediatek/built-in.a
  AR      drivers/media/platform/microchip/built-in.a
13 warnings generated.
  AR      drivers/power/reset/built-in.a
  AR      drivers/media/platform/nuvoton/built-in.a
  AR      drivers/power/built-in.a
  AR      drivers/media/platform/nvidia/tegra-vde/built-in.a
  AR      drivers/mmc/built-in.a
  AR      drivers/media/platform/nvidia/built-in.a
  AR      drivers/ufs/built-in.a
  AR      drivers/media/platform/nxp/dw100/built-in.a
  AR      drivers/firmware/arm_ffa/built-in.a
  AR      drivers/media/platform/nxp/imx-jpeg/built-in.a
  AR      drivers/firmware/arm_scmi/built-in.a
  AR      drivers/media/platform/nxp/imx8-isi/built-in.a
  AR      drivers/firmware/broadcom/built-in.a
  AR      drivers/media/platform/nxp/built-in.a
  AR      drivers/firmware/cirrus/built-in.a
  AR      drivers/media/platform/qcom/camss/built-in.a
  CC      drivers/input/ff-core.o
  AR      drivers/firmware/meson/built-in.a
  AR      drivers/media/platform/qcom/venus/built-in.a
  AR      drivers/firmware/microchip/built-in.a
  AR      drivers/media/platform/qcom/built-in.a
  AR      drivers/firmware/efi/built-in.a
  AR      drivers/media/platform/raspberrypi/pisp_be/built-in.a
  AR      drivers/firmware/imx/built-in.a
  CC      drivers/input/touchscreen.o
  AR      drivers/media/platform/raspberrypi/built-in.a
  AR      drivers/firmware/psci/built-in.a
  AR      drivers/media/platform/renesas/rcar-vin/built-in.a
  AR      drivers/firmware/qcom/built-in.a
  AR      drivers/media/platform/renesas/rzg2l-cru/built-in.a
  AR      drivers/firmware/smccc/built-in.a
  AR      drivers/media/platform/renesas/vsp1/built-in.a
  AR      drivers/media/platform/renesas/built-in.a
  AR      drivers/firmware/tegra/built-in.a
  AR      drivers/firmware/xilinx/built-in.a
  AR      drivers/media/platform/rockchip/rga/built-in.a
  AR      drivers/firmware/built-in.a
  AR      drivers/media/platform/rockchip/rkisp1/built-in.a
  CC      drivers/clocksource/timer-of.o
  AR      drivers/media/platform/rockchip/built-in.a
  AR      drivers/media/platform/samsung/exynos-gsc/built-in.a
  AR      drivers/media/platform/samsung/exynos4-is/built-in.a
  AR      drivers/media/platform/samsung/s3c-camif/built-in.a
  AR      drivers/media/platform/samsung/s5p-g2d/built-in.a
  AR      drivers/media/platform/samsung/s5p-jpeg/built-in.a
  AR      drivers/media/platform/samsung/s5p-mfc/built-in.a
  AR      drivers/media/platform/samsung/built-in.a
  AR      drivers/media/platform/st/sti/bdisp/built-in.a
  AR      drivers/media/platform/st/sti/c8sectpfe/built-in.a
  AR      drivers/media/platform/st/sti/delta/built-in.a
  AR      drivers/media/platform/st/sti/hva/built-in.a
In file included from ../drivers/clocksource/timer-of.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/clocksource/timer-of.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/clocksource/timer-of.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-of.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-of.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-of.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-of.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-of.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-of.c:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  AR      drivers/media/platform/st/stm32/built-in.a
  AR      drivers/media/platform/st/built-in.a
  AR      drivers/media/platform/sunxi/sun4i-csi/built-in.a
  AR      drivers/media/platform/ti/am437x/built-in.a
  AR      drivers/media/platform/sunxi/sun6i-csi/built-in.a
  AR      drivers/media/platform/ti/cal/built-in.a
  AR      drivers/input/built-in.a
  AR      drivers/media/platform/sunxi/sun6i-mipi-csi2/built-in.a
  AR      drivers/media/platform/ti/vpe/built-in.a
  AR      drivers/hid/built-in.a
  AR      drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/built-in.a
  AR      drivers/media/platform/ti/davinci/built-in.a
  CC      drivers/of/base.o
  AR      drivers/media/platform/sunxi/sun8i-di/built-in.a
  AR      drivers/media/platform/ti/j721e-csi2rx/built-in.a
  AR      drivers/media/platform/sunxi/sun8i-rotate/built-in.a
  AR      drivers/media/platform/ti/omap/built-in.a
  AR      drivers/media/platform/sunxi/built-in.a
  AR      drivers/media/platform/ti/omap3isp/built-in.a
  AR      drivers/media/platform/verisilicon/built-in.a
  AR      drivers/media/platform/ti/built-in.a
  AR      drivers/media/platform/via/built-in.a
  AR      drivers/media/platform/xilinx/built-in.a
13 warnings generated.
  CC      drivers/of/cpu.o
  AR      drivers/media/platform/built-in.a
  CC      drivers/clocksource/timer-probe.o
  AR      drivers/media/pci/ttpci/built-in.a
  AR      drivers/media/pci/b2c2/built-in.a
  AR      drivers/media/pci/pluto2/built-in.a
  AR      drivers/media/pci/dm1105/built-in.a
  AR      drivers/media/pci/pt1/built-in.a
  AR      drivers/media/pci/pt3/built-in.a
  AR      drivers/media/pci/mantis/built-in.a
  AR      drivers/media/pci/ngene/built-in.a
  AR      drivers/media/pci/ddbridge/built-in.a
  AR      drivers/media/pci/saa7146/built-in.a
  AR      drivers/media/pci/smipcie/built-in.a
  AR      drivers/media/pci/netup_unidvb/built-in.a
  AR      drivers/media/pci/intel/ipu3/built-in.a
  AR      drivers/media/pci/intel/ivsc/built-in.a
  AR      drivers/media/pci/intel/built-in.a
  AR      drivers/media/pci/built-in.a
  AR      drivers/media/usb/b2c2/built-in.a
  AR      drivers/media/usb/dvb-usb/built-in.a
  AR      drivers/media/usb/dvb-usb-v2/built-in.a
  AR      drivers/media/usb/s2255/built-in.a
  AR      drivers/media/usb/siano/built-in.a
In file included from ../drivers/clocksource/timer-probe.c:9:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/clocksource/timer-probe.c:9:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/clocksource/timer-probe.c:9:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
  AR      drivers/media/usb/ttusb-budget/built-in.a
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-probe.c:9:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-probe.c:9:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-probe.c:9:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-probe.c:9:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-probe.c:9:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-probe.c:9:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      drivers/of/device.o
  AR      drivers/media/usb/ttusb-dec/built-in.a
13 warnings generated.
  AR      drivers/media/usb/built-in.a
  CC      drivers/clocksource/dummy_timer.o
  AR      drivers/media/mmc/siano/built-in.a
  CC      drivers/of/module.o
  AR      drivers/media/mmc/built-in.a
  AR      drivers/media/firewire/built-in.a
  AR      drivers/media/spi/built-in.a
  AR      drivers/media/test-drivers/built-in.a
  AR      drivers/media/built-in.a
  AR      drivers/platform/goldfish/built-in.a
  AR      drivers/platform/built-in.a
  AR      drivers/hwtracing/intel_th/built-in.a
  AR      drivers/android/built-in.a
  CC      drivers/of/platform.o
In file included from ../drivers/clocksource/dummy_timer.c:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/clocksource/dummy_timer.c:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/clocksource/dummy_timer.c:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/dummy_timer.c:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/dummy_timer.c:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/dummy_timer.c:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/dummy_timer.c:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/dummy_timer.c:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/dummy_timer.c:8:
In file included from ../include/linux/clockchips.h:14:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/of/device.c:5:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/of/device.c:5:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/of/device.c:5:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/device.c:5:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/device.c:5:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/device.c:5:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/device.c:5:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/device.c:5:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/device.c:5:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  CC      drivers/clocksource/timer-clint.o
  CC      drivers/of/property.o
13 warnings generated.
  CC      drivers/of/kobj.o
In file included from ../drivers/of/platform.c:14:
In file included from ../include/linux/amba/bus.h:19:
In file included from ../include/linux/regulator/consumer.h:35:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/of/platform.c:14:
In file included from ../include/linux/amba/bus.h:19:
In file included from ../include/linux/regulator/consumer.h:35:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/of/platform.c:14:
In file included from ../include/linux/amba/bus.h:19:
In file included from ../include/linux/regulator/consumer.h:35:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/platform.c:14:
In file included from ../include/linux/amba/bus.h:19:
In file included from ../include/linux/regulator/consumer.h:35:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/platform.c:14:
In file included from ../include/linux/amba/bus.h:19:
In file included from ../include/linux/regulator/consumer.h:35:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/platform.c:14:
In file included from ../include/linux/amba/bus.h:19:
In file included from ../include/linux/regulator/consumer.h:35:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/platform.c:14:
In file included from ../include/linux/amba/bus.h:19:
In file included from ../include/linux/regulator/consumer.h:35:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/platform.c:14:
In file included from ../include/linux/amba/bus.h:19:
In file included from ../include/linux/regulator/consumer.h:35:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/platform.c:14:
In file included from ../include/linux/amba/bus.h:19:
In file included from ../include/linux/regulator/consumer.h:35:
In file included from ../include/linux/suspend.h:5:
In file included from ../include/linux/swap.h:9:
In file included from ../include/linux/memcontrol.h:13:
In file included from ../include/linux/cgroup.h:26:
In file included from ../include/linux/kernel_stat.h:8:
In file included from ../include/linux/interrupt.h:11:
In file included from ../include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from ../include/asm-generic/hardirq.h:17:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-clint.c:11:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/clocksource/timer-clint.c:11:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/clocksource/timer-clint.c:11:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-clint.c:11:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-clint.c:11:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-clint.c:11:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-clint.c:11:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/clocksource/timer-clint.c:11:
In file included from ../include/linux/clocksource.h:22:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/property.c:25:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from In file included from ../drivers/of/property.c:25:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
../drivers/clocksource/timer-clint.cIn file included from :../arch/riscv/include/asm/io.h:11136:
:
In file included from ../include/asm-generic/io.h../include/linux/clocksource.h::57422::
61In file included from :../arch/riscv/include/asm/io.h :warning: 136performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]:

../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;../include/uapi/linux/byteorder/little_endian.h
:                                                  ~~~~~~~~~~ ^35
:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/of/property.c:25:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/property.c:25:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/property.c:25:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/property.c:25:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/property.c:25:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/property.c:25:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/property.c:25:
In file included from ../include/linux/of_address.h:7:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
  CC      drivers/of/fdt.o
13 warnings generated.
  DTC     drivers/of/empty_root.dtb
  CC      drivers/of/fdt_address.o
13 warnings generated.
  AR      drivers/clocksource/built-in.a
  CC      drivers/of/address.o
13 warnings generated.
  CC      drivers/of/irq.o
  CC      drivers/of/of_reserved_mem.o
In file included from ../drivers/of/fdt.c:12:
In file included from ../include/linux/crash_dump.h:5:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/of/fdt.c:12:
In file included from ../include/linux/crash_dump.h:5:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/of/fdt.c:12:
In file included from ../include/linux/crash_dump.h:5:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/fdt.c:12:
In file included from ../include/linux/crash_dump.h:5:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/fdt.c:12:
In file included from ../include/linux/crash_dump.h:5:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/fdt.c:12:
In file included from ../include/linux/crash_dump.h:5:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/fdt.c:12:
In file included from ../include/linux/crash_dump.h:5:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/fdt.c:12:
In file included from ../include/linux/crash_dump.h:5:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/fdt.c:12:
In file included from ../include/linux/crash_dump.h:5:
In file included from ../include/linux/kexec.h:20:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/of/address.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/of/address.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/of/address.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/address.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/address.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/address.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/address.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/address.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/address.c:6:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
In file included from ../drivers/of/irq.c:24:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __raw_readb(PCI_IOBASE + addr);
                          ~~~~~~~~~~ ^
../include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                  ^
In file included from ../drivers/of/irq.c:24:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                        ~~~~~~~~~~ ^
../include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                  ^
In file included from ../drivers/of/irq.c:24:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writeb(value, PCI_IOBASE + addr);
                            ~~~~~~~~~~ ^
../include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                      ~~~~~~~~~~ ^
../include/asm-generic/io.h:744:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:104:53: note: expanded from macro 'insb'
#define insb(addr, buffer, count) __insb(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/irq.c:24:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:752:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:105:53: note: expanded from macro 'insw'
#define insw(addr, buffer, count) __insw(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/irq.c:24:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:760:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        insl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:106:53: note: expanded from macro 'insl'
#define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
                                         ~~~~~~~~~~ ^
In file included from ../drivers/of/irq.c:24:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:769:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsb(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:118:55: note: expanded from macro 'outsb'
#define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/irq.c:24:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:778:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsw(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:119:55: note: expanded from macro 'outsw'
#define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/irq.c:24:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:787:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        outsl(addr, buffer, count);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~
../arch/riscv/include/asm/io.h:120:55: note: expanded from macro 'outsl'
#define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
                                           ~~~~~~~~~~ ^
In file included from ../drivers/of/irq.c:24:
In file included from ../include/linux/of_irq.h:7:
In file included from ../include/linux/irq.h:20:
In file included from ../include/linux/io.h:14:
In file included from ../arch/riscv/include/asm/io.h:136:
../include/asm-generic/io.h:1115:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
        return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                  ~~~~~~~~~~ ^
13 warnings generated.
  WRAP    drivers/of/empty_root.dtb.S
  AS      drivers/of/empty_root.dtb.o
13 warnings generated.
13 warnings generated.
  AR      drivers/of/built-in.a
  AR      drivers/built-in.a
  AR      built-in.a
  AR      vmlinux.a
  LD      vmlinux.o
  OBJCOPY modules.builtin.modinfo
  GEN     modules.builtin
  MODPOST vmlinux.symvers
  UPD     include/generated/utsversion.h
  CC      init/version-timestamp.o
  LD      vmlinux
  NM      System.map
  OBJCOPY arch/riscv/boot/Image
  Kernel: arch/riscv/boot/Image is ready
  GZIP    arch/riscv/boot/Image.gz
  Kernel: arch/riscv/boot/Image.gz is ready
make[1]: Leaving directory '/tmp/kci/linux/build'
make: Leaving directory '/tmp/kci/linux'