[PATCH 6/9] fat: Fix possibly missing inode write on fsync(2)

[Jan Kara <jack@suse.cz>]

Use mmb inode buffer writeout infrastructure to reliably write out
inode's buffer on fsync(2).

Signed-off-by: Jan Kara <jack@suse.cz>
---
 fs/fat/inode.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 28f78df086ef..4ca00b7a618b 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -907,6 +907,7 @@ static int __fat_write_inode(struct inode *inode, int wait)
 	}
 	spin_unlock(&sbi->inode_hash_lock);
 	mark_buffer_dirty(bh);
+	MSDOS_I(inode)->i_metadata_bhs.inode_blk = bh->b_blocknr;
 	err = 0;
 	if (wait)
 		err = sync_dirty_buffer(bh);
@@ -925,7 +926,7 @@ static int fat_write_inode(struct inode *inode, struct writeback_control *wbc)
 		err = fat_clusters_flush(sb);
 		mutex_unlock(&MSDOS_SB(sb)->s_lock);
 	} else
-		err = __fat_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
+		err = __fat_write_inode(inode, 0);
 
 	return err;
 }
-- 
2.51.0