linux-kernel - Re: [PATCH 02/16] x86: remove unneeded defined(__ASSEMBLY_

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Date:   Tue, 24 Mar 2020 09:43:26 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Kees Cook <keescook@...omium.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "open list:HARDWARE RANDOM NUMBER GENERATOR CORE" 
        <linux-crypto@...r.kernel.org>, Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>,
        "H . Peter Anvin" <hpa@...or.com>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Subject: Re: [PATCH 02/16] x86: remove unneeded defined(__ASSEMBLY__) check
 from asm/dwarf2.h

On Tue, Mar 24, 2020 at 1:49 AM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> This header file has the following check at the top:
>
>   #ifndef __ASSEMBLY__
>   #warning "asm/dwarf2.h should be only included in pure assembly files"
>   #endif
>
> So, we expect defined(__ASSEMBLY__) is always true.
>
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> Acked-by: Jason A. Donenfeld <Jason@...c4.com>

Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>

> ---
>
>  arch/x86/include/asm/dwarf2.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/x86/include/asm/dwarf2.h b/arch/x86/include/asm/dwarf2.h
> index ae391f609840..5a0502212bc5 100644
> --- a/arch/x86/include/asm/dwarf2.h
> +++ b/arch/x86/include/asm/dwarf2.h
> @@ -36,7 +36,7 @@
>  #define CFI_SIGNAL_FRAME
>  #endif
>
> -#if defined(CONFIG_AS_CFI_SECTIONS) && defined(__ASSEMBLY__)
> +#if defined(CONFIG_AS_CFI_SECTIONS)
>  #ifndef BUILD_VDSO
>         /*
>          * Emit CFI data in .debug_frame sections, not .eh_frame sections.
> --
> 2.17.1
>
> --
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-- 
Thanks,
~Nick Desaulniers