From: Li Zefan <lizf@cn.fujitsu.com>
Date: Sun, 20 Nov 2011 12:33:38 +0000 (-0500)
Subject: Btrfs: avoid unnecessary bitmap search for cluster setup
X-Git-Tag: v3.2-rc3~14^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=52621cb6ed0e0e14358bb317bda7cd5fbd5c2a27;p=pandora-kernel.git

Btrfs: avoid unnecessary bitmap search for cluster setup

setup_cluster_no_bitmap() searches all the extents and bitmaps starting
from offset. Therefore if it returns -ENOSPC, all the bitmaps starting
from offset are in the bitmaps list, so it's sufficient to search from
this list in setup_cluser_bitmap().

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