tree b46918ae6c8d1ab626c804603d11abc5e9628548
parent ddb47afa50f2f2713ef28d22380d3bf8fae648db
author Wang Shilong <wangsl-fnst@cn.fujitsu.com> 1365418582 +0000
committer Josef Bacik <jbacik@fusionio.com> 1367870081 -0400

Btrfs: use tree_root to avoid edquot when disabling quota

Steps to reproduce:
	mkfs.btrfs <disk>
	mount <disk> <mnt>
	btrfs quota enable <mnt>
	btrfs sub create <mnt>/subv
	btrfs qgroup limit 10K <mnt>/subv
	btrfs quota disable <mnt>/subv

It is wrong for qgroup to reserve when disabling quota,
so just use tree_root to avoid edquot when disabling quota.

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