4 include/linux/spinlock_rt.h:115:2: error: ‘return’ with a value, in function returning void [-Werror=return-type]
   4 include/linux/spinlock_rt.h:115:2: error: expected expression before ‘do’
   2 arm-linux-gnueabihf-gcc: error: unrecognized -march target: armv3m
   2 arm-linux-gnueabihf-gcc: error: missing argument to ‘-march=’
   3 kernel/rcu/tasks.h:736:13: warning: ‘show_rcu_tasks_rude_gp_kthread’ defined but not used [-Wunused-function]
   2 drivers/clk/renesas/rzg2l-cpg.c:504:48: warning: passing argument 2 of ‘clk_mux_val_to_index’ discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
   2 drivers/clk/renesas/rzg2l-cpg.c:476:43: warning: passing argument 1 of ‘clk_mux_index_to_val’ discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
   2 cc1: some warnings being treated as errors
   2 WARNING: modpost: Symbol info of vmlinux is missing. Unresolved symbol check will be entirely skipped.
   2 <stdin>:830:2: warning: #warning syscall fstat64 not implemented [-Wcpp]
   2 <stdin>:1127:2: warning: #warning syscall fstatat64 not implemented [-Wcpp]
   1 drivers/block/paride/bpck.c:32: warning: "PC" redefined
   1 WARNING: modpost: vmlinux.o(___ksymtab_gpl+ixp4xx_irq_init+0x0): Section mismatch in reference from the variable __ksymtab_ixp4xx_irq_init to the function .init.text:ixp4xx_irq_init()
   1 WARNING: modpost: vmlinux.o(___ksymtab+prom_init_numa_memory+0x0): Section mismatch in reference from the variable __ksymtab_prom_init_numa_memory to the function .init.text:prom_init_numa_memory()