From: Chao Yu <chao2.yu@samsung.com>
Date: Mon, 15 Sep 2014 10:04:44 +0000 (+0800)
Subject: f2fs: fix to clean previous mount option when remount_fs
X-Git-Tag: fixes-for-v3.18-merge-window~8^2~13
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=26666c8a4366debae30ae37d0688b2bec92d196a;p=pandora-kernel.git

f2fs: fix to clean previous mount option when remount_fs

In manual of mount, we descript remount as below:

"mount -o remount,rw /dev/foo /dir
After  this call all old mount options are replaced and arbitrary stuff from
fstab is ignored, except the loop= option which is internally generated and
maintained by the mount command."

Previously f2fs do not clear up old mount options when remount_fs, so we have no
chance of disabling previous option (e.g. flush_merge). Fix it.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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