From: Liu Bo <liubo2009@cn.fujitsu.com>
Date: Fri, 29 Jun 2012 09:58:48 +0000 (-0600)
Subject: Btrfs: use mnt_want_write_file instead of mnt_want_write
X-Git-Tag: v3.6-rc1~81^2~27
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e54bfa31044d602a57d4e190f6d1c3763ea76bfe;p=pandora-kernel.git

Btrfs: use mnt_want_write_file instead of mnt_want_write

mnt_want_write_file is faster when file has been opened for write.

Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
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