From: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Date: Fri, 31 Jan 2014 16:42:05 +0000 (+0800)
Subject: Btrfs: only add roots if necessary in find_parent_nodes()
X-Git-Tag: v3.15-rc1~96^2~101
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=98cfee214394a3560bd4ce3209b55a71c4267783;p=pandora-kernel.git

Btrfs: only add roots if necessary in find_parent_nodes()

find_all_leafs() dosen't need add all roots actually, add roots only
if we need, this can avoid unnecessary ulist dance.

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
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