--- old/usr/src/uts/common/fs/zfs/vdev_missing.c	Mon Apr  7 00:45:28 2008
+++ new/usr/src/uts/common/fs/zfs/vdev_missing.c	Mon Apr  7 00:45:28 2008
@@ -91,6 +91,7 @@
 	vdev_missing_io_start,
 	vdev_missing_io_done,
 	NULL,
+	NULL,
 	VDEV_TYPE_MISSING,	/* name of this vdev type */
 	B_TRUE			/* leaf vdev */
 };