tree 3698e7d02602b791f783a2b8877651f538db3543
parent 85d85a743da894029723e002eb556ceeebc03658
author Li Zefan <lizf@cn.fujitsu.com> 1310613483 +0000
committer Chris Mason <chris.mason@oracle.com> 1312223449 -0400

Btrfs: clean up search_extent_mapping()

rb_node returned by __tree_search() can be a valid pointer or NULL,
but won't be some errno.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>