From: Frederic Weisbecker <fweisbec@gmail.com>
Date: Mon, 16 Nov 2009 14:42:18 +0000 (+0100)
Subject: x86: Add missing might_fault() checks to copy_{to,from}_user()
X-Git-Tag: v2.6.33-rc1~396^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3c93ca00eeeb774c7dd666cc7286a9e90c53e998;p=pandora-kernel.git

x86: Add missing might_fault() checks to copy_{to,from}_user()

On x86-64, copy_[to|from]_user() rely on assembly routines that
never call might_fault(), making us missing various lockdep
checks.

This doesn't apply to __copy_from,to_user() that explicitly
handle these calls, neither is it a problem in x86-32 where
copy_to,from_user() rely on the "__" prefixed versions that
also call might_fault().

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1258382538-30979-1-git-send-email-fweisbec@gmail.com>
[ v2: fix module export ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

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