From: Eugene Surovegin <ebs@ebshome.net>
Date: Tue, 28 Mar 2006 18:13:12 +0000 (-0800)
Subject: [PATCH] lock PTE before updating it in 440/BookE page fault handler
X-Git-Tag: v2.6.17-rc1~165^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bab70a4af737f623de5b034976a311055308ab86;p=pandora-kernel.git

[PATCH] lock PTE before updating it in 440/BookE page fault handler

Fix 44x and BookE page fault handler to correctly lock PTE before
trying to pte_update() it, otherwise this PTE might be swapped out
after pte_present() check but before pte_uptdate() call, resulting in
corrupted PTE. This can happen with enabled preemption and low memory
condition.

Signed-off-by: Eugene Surovegin <ebs@ebshome.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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