From: WuBo <wu.bo@cn.fujitsu.com>
Date: Tue, 26 Jul 2011 03:30:11 +0000 (+0000)
Subject: Btrfs: Protect the readonly flag of block group
X-Git-Tag: v3.1-rc1~82^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=61cfea9bb84d41b09e59822c33b3eb27acc48358;p=pandora-kernel.git

Btrfs: Protect the readonly flag of block group

The access for ro in btrfs_block_group_cache should be protected
because of the racy lock in relocation.

Signed-off-by: Wu Bo <wu.bo@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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