fix test bug

Author: pcd1193182

module/zfs/dsl_dir.c

@@ -2309,9 +2309,11 @@ dsl_dir_activity_in_progress(dsl_dir_t *dd, dsl_dataset_t *ds,
 		if (error != 0)
 			break;
 
+		mutex_enter(&os->os_user_ptr_lock);
+		void *user = dmu_objset_get_user(os);
+		mutex_exit(&os->os_user_ptr_lock);
 		if (dmu_objset_type(os) != DMU_OST_ZFS ||
-		    dmu_objset_get_user(os) == NULL || 
-		    zfs_get_vfs_flag_unmounted(os)) {
+		    user == NULL || zfs_get_vfs_flag_unmounted(os)) {
 			*in_progress = B_FALSE;
 			return (0);
 		}

module/zfs/zfs_ioctl.c

@@ -4132,7 +4132,6 @@ zfs_ioc_wait_fs(const char *name, nvlist_t *innvl, nvlist_t *outnvl)
 	mutex_exit(&dd->dd_activity_lock);
 
 	dsl_dataset_rele(ds, FTAG);
-	dsl_dir_rele(dd, FTAG);
 
 	if (error == 0)
 		fnvlist_add_boolean_value(outnvl, ZFS_WAIT_WAITED, waited);