HPFS: Implement fsync for hpfs

Implement fsync for hpfs.

Signed-off-by: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/hpfs/file.c b/fs/hpfs/file.c
index 09a642f..89c500e 100644
--- a/fs/hpfs/file.c
+++ b/fs/hpfs/file.c
@@ -20,8 +20,8 @@
 
 int hpfs_file_fsync(struct file *file, int datasync)
 {
-	/*return file_fsync(file, datasync);*/
-	return 0; /* Don't fsync :-) */
+	struct inode *inode = file->f_mapping->host;
+	return sync_blockdev(inode->i_sb->s_bdev);
 }
 
 /*