The same license nit I found in the previous two versions of this patch.
On Wed, 2015-03-25 at 17:04 +0100, Christoph Hellwig wrote:
+ * This program is free software; you can redistribute it and/or
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
This states the license is GPL v2.
So you probably want to use