From: Miao Xie <miaox@cn.fujitsu.com>
Date: Fri, 11 Nov 2011 01:45:04 +0000 (-0500)
Subject: Btrfs: fix nocow when deleting the item
X-Git-Tag: v3.2-rc2~22^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=924cd8fbe41851eda2b68bf2ed501b2777fd77b4;p=pandora-kernel.git

Btrfs: fix nocow when deleting the item

btrfs_previous_item() just search the b+ tree, do not COW the nodes or leaves,
if we modify the result of it, the meta-data will be broken. fix it.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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