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Message-ID: <3D6AACB7.4030506@quark.didntduck.org>
Date: Mon, 26 Aug 2002 18:33:27 -0400
From: Brian Gerst <bgerst@quark.didntduck.org>
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To: Robert Love <rml@tech9.net>
CC: torvalds@transmeta.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] make raid5 checksums preempt-safe
References: <1030392363.905.418.camel@phantasy>
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Robert Love wrote:
> Linus,
> 
> The raid5 xor checksums use MMX/SSE state and are not preempt-safe.
> 
> Attached patch disables preemption in FPU_SAVE and XMMS_SAVE and
> restores it in FPU_RESTORE and XMMS_RESTORE - preventing preemption
> while in fp mode.
> 
> Please, apply.
> 
> 	Robert Love

Use kernel_fpu_begin() and kernel_fpu_end() instead of reinventing the 
wheel.  The current code is broken wrt SSE as well.

--
				Brian Gerst