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Subject: Re: [PATCH] i386 __verify_write fixes
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Brian Gerst <bgerst@didntduck.org>
Cc: Linus Torvalds <torvalds@transmeta.com>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Date: 22 Oct 2002 16:06:18 +0100
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On Sun, 2002-10-13 at 21:13, Brian Gerst wrote:
> mark the page read-only.  A 386 would continue to write to the page when 
> the first thread woke up again.  We need to prevent anyone from changing 
> the page permissions until we are done writing to userspace.  My 
> suggestion is to replace access_ok() with begin_user_{read,write}(), and 
> add end_user_{read,write}().  Thoughs?

For 2.6 with the time scale as it is I think we just block pre-emption
on 386. Its not a big deal since almost nobody uses 386 any more

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