f2fs: flush dirty data for bmap

Users expect bmap will give allocated block addresses.
Let's play likewise ext4.

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2015-10-19 10:29:51 -07:00
commit 1d373a0ef7