From: Miao Xie <miaox@cn.fujitsu.com>
Date: Thu, 6 Sep 2012 10:04:27 +0000 (-0600)
Subject: Btrfs: fix unprotected ->log_batch
X-Git-Tag: v3.7-rc1~71^2~70
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2ecb79239bcd04c9d410f4cdce16adb6840b19da;p=pandora-kernel.git

Btrfs: fix unprotected ->log_batch

We forget to protect ->log_batch when syncing a file, this patch fix
this problem by atomic operation. And ->log_batch is used to check
if there are parallel sync operations or not, so it is unnecessary to
reset it to 0 after the sync operation of the current log tree complete.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
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