3 include/asm-generic/io.h:787:2: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic]
   3 include/asm-generic/io.h:778:2: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic]
   3 include/asm-generic/io.h:769:2: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic]
   3 include/asm-generic/io.h:760:2: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic]
   3 include/asm-generic/io.h:752:2: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic]
   3 include/asm-generic/io.h:744:2: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic]
   3 include/asm-generic/io.h:605:59: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic]
   3 include/asm-generic/io.h:595:59: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic]
   3 include/asm-generic/io.h:585:33: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic]
   3 include/asm-generic/io.h:574:61: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic]
   3 include/asm-generic/io.h:561:61: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic]
   3 include/asm-generic/io.h:548:31: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic]
   3 include/asm-generic/io.h:1115:55: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic]
   1 vmlinux.o: warning: objtool: cpuidle_enter_state+0x221: return with instrumentation enabled
   1 vmlinux.o: warning: objtool: cpuidle_enter_state+0x15a: return with instrumentation enabled