linux-kernel - Re: [PATCH] mark read_crX() asm code as volatile

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Date:	Tue, 2 Oct 2007 16:17:44 +0200
From:	Andi Kleen <ak@...e.de>
To:	Kirill Korotaev <dev@...nvz.org>
Cc:	Andrew Morton <akpm@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	devel@...nvz.org
Subject: Re: [PATCH] mark read_crX() asm code as volatile

On Tuesday 02 October 2007 16:08:32 Kirill Korotaev wrote:
> Some gcc versions (I checked at least 4.1.1 from RHEL5 & 4.1.2 from gentoo)
> can generate incorrect code with read_crX()/write_crX() functions mix up,
> due to cached results of read_crX().

added thanks

-Andi



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