From: Peter Zijlstra <peterz@infradead.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@kernel.org>,
Wedson Almeida Filho <wedsonaf@gmail.com>,
Ingo Molnar <mingo@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
x86@kernel.org, linux-kernel@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH] x86: Use asm-goto to implement mutex fast path on x86-64
Date: Fri, 28 Jun 2013 17:15:33 +0200 [thread overview]
Message-ID: <20130628151533.GD6626@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <51CD99C2.9040109@zytor.com>
On Fri, Jun 28, 2013 at 07:12:18AM -0700, H. Peter Anvin wrote:
> On 06/28/2013 07:09 AM, Borislav Petkov wrote:
> >
> > Our testing for asm goto otherwise is a bit more, hmm, hands-on in
> > arch/x86/include/asm/cpufeature.h:
> >
> > #if __GNUC__ > 4 || __GNUC_MINOR__ >= 5
> >
> > Maybe I should change that to the more explicit CC_HAVE_ASM_GOTO then.
> >
>
> We should... we didn't have the asm goto test at the time that code was
> written, but I think the tracing guys added it either because some
> distros backported asm goto or to deal with it on non-x86 architectures.
gcc backport in distro iirc
next prev parent reply other threads:[~2013-06-28 15:15 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-28 10:54 [PATCH] x86: Use asm-goto to implement mutex fast path on x86-64 Wedson Almeida Filho
2013-06-28 11:19 ` Ingo Molnar
2013-06-28 14:09 ` Borislav Petkov
2013-06-28 14:12 ` H. Peter Anvin
2013-06-28 15:15 ` Peter Zijlstra [this message]
2013-06-28 16:41 ` [PATCH] x86, cpufeature: Use new CC_HAVE_ASM_GOTO Borislav Petkov
2013-07-05 14:24 ` [tip:x86/cpu] " tip-bot for Borislav Petkov
2013-06-29 23:56 ` [PATCH] x86: Use asm-goto to implement mutex fast path on x86-64 Wedson Almeida Filho
2013-06-30 22:00 ` Borislav Petkov
2013-07-01 7:50 ` Ingo Molnar
2013-07-01 10:23 ` Borislav Petkov
2013-07-01 11:11 ` Ingo Molnar
2013-07-01 12:29 ` Borislav Petkov
2013-07-01 12:50 ` Ingo Molnar
2013-07-01 14:48 ` Borislav Petkov
2013-07-01 22:28 ` Borislav Petkov
2013-07-01 22:35 ` Wedson Almeida Filho
2013-07-01 22:44 ` Borislav Petkov
2013-07-02 6:39 ` Ingo Molnar
2013-07-02 10:29 ` Borislav Petkov
2013-07-01 14:30 ` H. Peter Anvin
2013-07-01 14:36 ` Borislav Petkov
2013-07-01 14:45 ` H. Peter Anvin
2013-07-01 14:50 ` Borislav Petkov
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