linux-kernel - Re: [PATCH] [PATCH] Gaurantee spinlocks implicit barrier for !PREEMPT

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Message-ID: <1365577957.30071.13.camel@laptop>
Date:	Wed, 10 Apr 2013 09:12:37 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Steven Rostedt <srostedt@...hat.com>,
	Vineet Gupta <Vineet.Gupta1@...opsys.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Christian Ruppert <christian.ruppert@...lis.com>,
	Pierrick Hascoet <pierrick.hascoet@...lis.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] [PATCH] Gaurantee spinlocks implicit barrier for
 !PREEMPT_COUNT

On Tue, 2013-04-09 at 07:32 -0700, Linus Torvalds wrote:
> Something like the attached (still untested, although it seems to at
> least compile) patch. Comments?

Yes, makes me feel far more comfortable than this "asm volatile"
business (which as you noted has holes in it).

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