Due to DIO stuff, commit 1ef30be142d2cc60e2687ef267de864cf31be995 makes btrfs
not call btrfs_update_inode when it does not update i_disk_size, but in buffer
write case, we need to update btrfs internal inode's trans stuff, so that the
log code can find the inode's changes.

Signed-off-by: Liu Bo <liubo2...@cn.fujitsu.com>
---
 fs/btrfs/inode.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 93c9d22..47dcbc0 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1790,7 +1790,8 @@ static int btrfs_finish_ordered_io(struct inode *inode, 
u64 start, u64 end)
        if (!ret) {
                ret = btrfs_update_inode(trans, root, inode);
                BUG_ON(ret);
-       }
+       } else
+               btrfs_set_inode_last_trans(trans, inode);
        ret = 0;
 out:
        if (nolock) {
-- 
1.6.5.2

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