tree c31afbc9ba7dbc27eea43a0319a64732d180a3d2
parent f7d572188b7b2a6d07081688f8602dc407186e64
author Miao Xie <miaox@cn.fujitsu.com> 1320975904 -0500
committer Chris Mason <chris.mason@oracle.com> 1320975904 -0500

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>