linux-kernel - Re: [PATCH 09/10] x86-32: use SSE for atomic64

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Message-ID: <1266490846.26719.206.camel@laptop>
Date:	Thu, 18 Feb 2010 12:00:46 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Luca Barbieri <luca@...a-barbieri.com>
Cc:	mingo@...e.hu, hpa@...or.com, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 09/10] x86-32: use SSE for atomic64_read/set if
 available

On Thu, 2010-02-18 at 11:50 +0100, Luca Barbieri wrote:
> If we use the stack instead of per-CPU variables, all IRQs and NMIs
> preserve CR0 and the SSE registers, so this would be safe, right?

You'd have to take special care to deal with nested IRQs I think.

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