From e69bcee37692f5d8c557335ddd2444cb4afe0005 Mon Sep 17 00:00:00 2001
From: Qu Wenruo <quwenruo@cn.fujitsu.com>
Date: Fri, 17 Apr 2015 10:23:16 +0800
Subject: [PATCH] btrfs: qgroup: Cleanup the old ref_node-oriented mechanism.

Goodbye, the old mechanisim.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
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Reading git-format-patch failed