linux-kernel - Re: cmpxchg and x86 flags output

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Message-ID: <16238.1466611894@warthog.procyon.org.uk>
Date:	Wed, 22 Jun 2016 17:11:34 +0100
From:	David Howells <dhowells@...hat.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	dhowells@...hat.com, Peter Zijlstra <peterz@...radead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-arch <linux-arch@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: cmpxchg and x86 flags output

H. Peter Anvin <hpa@...or.com> wrote:

> The question for me is for things like lock patching that we do on x86...

This might be pertinent to what you're asking:

	https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70973

David