Btrfs: check write access to mount earlier while creating snapshots
authorLiu Bo <liubo2009@cn.fujitsu.com>
Fri, 29 Jun 2012 09:58:46 +0000 (03:58 -0600)
committerChris Mason <chris.mason@fusionio.com>
Mon, 23 Jul 2012 20:27:56 +0000 (16:27 -0400)
Move check of write access to mount into upper functions so that we can
use mnt_want_write_file instead, which is faster than mnt_want_write.

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

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