From 0353808cae35bc81c86e3510748a10f6bdff41b8 Mon Sep 17 00:00:00 2001
From: Miao Xie <miaox@cn.fujitsu.com>
Date: Thu, 26 Dec 2013 13:07:03 +0800
Subject: [PATCH] Btrfs: cleanup code of btrfs_balance_delayed_items()

- move the condition check for wait into a function
- use wait_event_interruptible instead of prepare-schedule-finish process

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
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