From: Nick Desaulniers <ndesaulniers@google.com>
To: Segher Boessenkool <segher@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>, X86 ML <x86@kernel.org>,
Michael Matz <matz@suse.de>,
linux-toolchains@vger.kernel.org,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] x86/sev: Mark snp_abort() noreturn
Date: Wed, 24 Aug 2022 11:44:35 -0700 [thread overview]
Message-ID: <CAKwvOdm+yFhZ2pYLJ5vpj1YyNJmG=UVF4cTz_m+0UfDGNGsRbQ@mail.gmail.com> (raw)
In-Reply-To: <20220824172929.GA25951@gate.crashing.org>
On Wed, Aug 24, 2022 at 10:33 AM Segher Boessenkool
<segher@kernel.crashing.org> wrote:
>
> Hi!
>
> On Wed, Aug 24, 2022 at 05:24:20PM +0200, Borislav Petkov wrote:
> > Mark both the function prototype and definition as noreturn in order to
> > prevent the compiler from doing transformations which confuse objtool
> > like so:
> >
> > vmlinux.o: warning: objtool: sme_enable+0x71: unreachable instruction
>
> Would -Wmissing-noreturn have caught this?
Oh, that's shiny. Is that relatively new?
--
Thanks,
~Nick Desaulniers
next prev parent reply other threads:[~2022-08-24 18:44 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-24 15:24 [PATCH] x86/sev: Mark snp_abort() noreturn Borislav Petkov
2022-08-24 15:38 ` Peter Zijlstra
2022-08-24 15:48 ` Borislav Petkov
2022-08-24 16:16 ` Peter Zijlstra
2022-08-24 16:43 ` [PATCH v2] " Borislav Petkov
2022-08-24 17:29 ` [PATCH] " Segher Boessenkool
2022-08-24 18:23 ` Borislav Petkov
2022-08-24 18:44 ` Nick Desaulniers [this message]
2022-08-24 19:43 ` Segher Boessenkool
2022-08-24 20:45 ` Peter Zijlstra
2022-08-24 22:41 ` Segher Boessenkool
2022-08-25 6:41 ` Peter Zijlstra
2022-08-25 12:29 ` Michael Matz
2022-08-25 12:58 ` Segher Boessenkool
2022-08-25 13:12 ` David Laight
2022-08-30 4:48 ` Josh Poimboeuf
2022-08-30 4:46 ` Josh Poimboeuf
2022-08-25 14:01 ` [tip: x86/urgent] " tip-bot2 for Borislav Petkov
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