orangefs: don't call filemap_write_and_wait from fsync

Orangefs doesn't do buffered writes yet, so there's no point in
initiating and waiting for writeback.
Signed-off-by: NJeff Layton <jlayton@redhat.com>
Signed-off-by: NMike Marshall <hubcap@omnibond.com>

fs/orangefs/file.c

@@ -646,14 +646,11 @@ static int orangefs_fsync(struct file *file,
 		       loff_t end,
 		       int datasync)
 {
-	int ret = -EINVAL;
+	int ret;
 	struct orangefs_inode_s *orangefs_inode =
 		ORANGEFS_I(file_inode(file));
 	struct orangefs_kernel_op_s *new_op = NULL;
 
-	/* required call */
-	filemap_write_and_wait_range(file->f_mapping, start, end);
-
 	new_op = op_alloc(ORANGEFS_VFS_OP_FSYNC);
 	if (!new_op)
 		return -ENOMEM;