From: Miao Xie <miaox@cn.fujitsu.com>
Date: Tue, 29 Jan 2013 10:13:12 +0000 (+0000)
Subject: Btrfs: use seqlock to protect fs_info->avail_{data, metadata, system}_alloc_bits
X-Git-Tag: v3.9-rc1~17^2~29^2~47
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=de98ced9e743656d108de41841797def0f5cb951;p=pandora-kernel.git

Btrfs: use seqlock to protect fs_info->avail_{data, metadata, system}_alloc_bits

There is no lock to protect
  fs_info->avail_{data, metadata, system}_alloc_bits,
it may introduce some problem, such as the wrong profile
information, so we add a seqlock to protect them.

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---

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