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Subject: Re: [RFC][PATCH] Cross Memory Attach
From: Peter Zijlstra <peterz@infradead.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Christopher Yeoh <cyeoh@au1.ibm.com>, linux-kernel@vger.kernel.org
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Date: Thu, 16 Sep 2010 18:27:31 +0200
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On Wed, 2010-09-15 at 08:11 -0700, Linus Torvalds wrote:

>    if (copy_to)
>       ret = copy_from_user(..);
>    else
>       ret = copy_to_user(..);
>    kunmap(process_pages[i]);
>    if (ret)
>       goto out; 

Shouldn't we be using kmap_atomic()