On Thu, Oct 19, 2023 at 04:07:35AM +0800, kernel test robot wrote: > arch/s390/include/asm/ctlreg.h:129:9: warning: array subscript 0 is outside array bounds of 'struct ctlreg[0]' [-Warray-bounds=] > arch/s390/include/asm/ctlreg.h:80:9: warning: array subscript 0 is outside array bounds of 'struct ctlreg[0]' [-Warray-bounds=] ... > |-- s390-defconfig > | `-- arch-s390-include-asm-ctlreg.h:warning:array-subscript-is-outside-array-bounds-of-struct-ctlreg ... > s390 defconfig gcc I'm wondering how this warning can appear in the builds. array-bounds warnings are explicitly disabled, see init/Kconfig: CC_NO_ARRAY_BOUNDS. And as expected, if I compile the kernel with gcc, defconfig, and with or without W=1 the option -Wno-array-bounds is passed to the compiler. And also as expected I do not see the above warnings. So something is quite odd here.
