--- old/usr/src/uts/common/fs/zfs/vdev_file.c	Mon Apr  7 00:45:27 2008
+++ new/usr/src/uts/common/fs/zfs/vdev_file.c	Mon Apr  7 00:45:27 2008
@@ -316,6 +316,7 @@
 	vdev_file_io_start,
 	vdev_file_io_done,
 	NULL,
+	NULL,
 	VDEV_TYPE_FILE,		/* name of this vdev type */
 	B_TRUE			/* leaf vdev */
 };