From: Qu Wenruo <quwenruo@cn.fujitsu.com>
Date: Mon, 6 Jan 2014 01:58:25 +0000 (+0800)
Subject: btrfs: Add "barrier" option to support "-o remount,barrier"
X-Git-Tag: v3.14-rc1~29^2~60
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=842bef5891aaf13e2dede01d86397d810fde2dd8;p=pandora-kernel.git

btrfs: Add "barrier" option to support "-o remount,barrier"

Btrfs can be remounted without barrier, but there is no "barrier" option
so nobody can remount btrfs back with barrier on. Only umount and
mount again can re-enable barrier.(Quite awkward)

Also the mount options in the document is also changed slightly for the
further pairing options changes.

Reported-by: Daniel Blueman <daniel@quora.org>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Mike Fleetwood <mike.fleetwood@googlemail.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
---

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