linux-kernel - Re: [PATCH] gcc4: Add 'asm goto' miscompilation quirk

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Date:	Thu, 10 Oct 2013 07:04:18 -0700
From:	Richard Henderson <rth@...ddle.net>
To:	Jakub Jelinek <jakub@...hat.com>, Ingo Molnar <mingo@...nel.org>
CC:	Peter Zijlstra <peterz@...radead.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Fengguang Wu <fengguang.wu@...el.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gcc4: Add 'asm goto' miscompilation quirk

On 10/10/2013 01:31 AM, Jakub Jelinek wrote:
> Also, for the bitops patch, you probably want an asm_volatile_goto variant.

Why?  Asm without output (which asm goto must be) are automatically volatile.


r!
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