From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Date: Thu, 10 Sep 2009 02:36:03 +0000 (-0400)
Subject: ext4: Take page lock before looking at attached buffer_heads flags
X-Git-Tag: v2.6.32-rc1~633^2~22
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a827eaffff07c7d58a4cb32158cbeb4849f4e33a;p=pandora-kernel.git

ext4: Take page lock before looking at attached buffer_heads flags

In order to check whether the buffer_heads are mapped we need to hold
page lock. Otherwise a reclaim can cleanup the attached buffer_heads.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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