On Fri, Apr 7, 2023 at 2:51 AM Nathan Chancellor <nat...@kernel.org> wrote:
>
> When building with W=1 after commit 80b6093b55e3 ("kbuild: add -Wundef
> to KBUILD_CPPFLAGS for W=1 builds"), the following warning occurs.
>
> In file included from arch/powerpc/kvm/bookehv_interrupts.S:26:
> arch/powerpc/kvm/../kernel/head_booke.h:20:6: warning: "THREAD_SHIFT" is
> not defined, evaluates to 0 [-Wundef]
> 20 | #if (THREAD_SHIFT < 15)
> | ^~~~~~~~~~~~
>
> THREAD_SHIFT is defined in thread_info.h but it is not directly included
> in head_booke.h, so it is possible for THREAD_SHIFT to be undefined. Add
> the include to ensure that THREAD_SHIFT is always defined.
>
> Reported-by: kernel test robot <l...@intel.com>
> Link: https://lore.kernel.org/202304050954.yskldczh-...@intel.com/
> Signed-off-by: Nathan Chancellor <nat...@kernel.org>
> ---
Reviewed-by: Masahiro Yamada <masahi...@kernel.org>
Thanks.
> arch/powerpc/kernel/head_booke.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/powerpc/kernel/head_booke.h
> b/arch/powerpc/kernel/head_booke.h
> index 37d43c172676..b6b5b01a173c 100644
> --- a/arch/powerpc/kernel/head_booke.h
> +++ b/arch/powerpc/kernel/head_booke.h
> @@ -5,6 +5,7 @@
> #include <asm/ptrace.h> /* for STACK_FRAME_REGS_MARKER */
> #include <asm/kvm_asm.h>
> #include <asm/kvm_booke_hv_asm.h>
> +#include <asm/thread_info.h> /* for THREAD_SHIFT */
>
> #ifdef __ASSEMBLY__
>
>
> ---
> base-commit: b0bbe5a2915201e3231e788d716d39dc54493b03
> change-id: 20230406-wundef-thread_shift_booke-e08d806ed656
>
> Best regards,
> --
> Nathan Chancellor <nat...@kernel.org>
>
--
Best Regards
Masahiro Yamada
