linux-kernel - Re: [PATCH] kbuild: dummy-tools: pretend we understand -fpatchable-function-entry

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Date:   Wed, 1 Nov 2023 23:30:56 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     "Jiri Slaby (SUSE)" <jirislaby@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Schier <nicolas@...sle.eu>,
        linux-kbuild@...r.kernel.org, Naveen N Rao <naveen@...nel.org>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Michael Ellerman <mpe@...erman.id.au>
Subject: Re: [PATCH] kbuild: dummy-tools: pretend we understand -fpatchable-function-entry

On Mon, Oct 30, 2023 at 8:34 PM Jiri Slaby (SUSE) <jirislaby@...nel.org> wrote:
>
> Commit 0f71dcfb4aef (powerpc/ftrace: Add support for
> -fpatchable-function-entry) added a script to check for
> -fpatchable-function-entry compiler support. The script expects compiler
> to emit the section __patchable_function_entries and few nops after a
> function entry.
>
> If the compiler understands and emits the above,
> CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY is set.
>
> So teach dummy-tools' gcc about this.
>
> Signed-off-by: Jiri Slaby (SUSE) <jirislaby@...nel.org>
> Cc: Masahiro Yamada <masahiroy@...nel.org>
> Cc: Nathan Chancellor <nathan@...nel.org>
> Cc: Nick Desaulniers <ndesaulniers@...gle.com>
> Cc: Nicolas Schier <nicolas@...sle.eu>
> Cc: linux-kbuild@...r.kernel.org
> Cc: Naveen N Rao <naveen@...nel.org>
> Cc: Christophe Leroy <christophe.leroy@...roup.eu>
> Cc: Michael Ellerman <mpe@...erman.id.au>
> ---


Applied to linux-kbuild.
Thanks.




-- 
Best Regards
Masahiro Yamada