--- a/usr/src/uts/common/fs/zfs/sys/dmu_traverse.h	Fri Apr 11 16:15:33 2008 -0700
+++ b/usr/src/uts/common/fs/zfs/sys/dmu_traverse.h	Fri Apr 11 18:36:28 2008 -0700
@@ -19,7 +19,7 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -100,6 +100,7 @@
 
 int traverse_dsl_dataset(struct dsl_dataset *ds, uint64_t txg_start,
     int advance, blkptr_cb_t func, void *arg);
+int traverse_zvol(objset_t *os, int advance, blkptr_cb_t func, void *arg);
 
 traverse_handle_t *traverse_init(spa_t *spa, blkptr_cb_t *func, void *arg,
     int advance, int zio_flags);