From: Liu Bo <bo.li.liu@oracle.com>
Date: Wed, 14 Nov 2012 14:35:30 +0000 (+0000)
Subject: Btrfs: protect devices list with its mutex
X-Git-Tag: v3.8-rc1~71^2~82
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d25628bdd66aedd6e07729d8dc6c8ee846d66d72;p=pandora-kernel.git

Btrfs: protect devices list with its mutex

Since we've kill the bigger one volume_mutex, we need to add devices
list mutex back.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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