o missing labeller free

o updated vgcfgrestore args
o change _check_for_open_devices only to check devices present in the hash
  table instead of using dev_iter which triggers a full scan even when only
  displaying command line help

lib/device/dev-cache.c

@@ -298,25 +298,17 @@ int dev_cache_init(void)
 	return 0;
 }
 
+iterate_fn _check_closed(void *data)
+{
+	struct device *dev = (struct device *) data;
+
+	if (dev->fd >= 0)
+		log_err("Device '%s' has been left open.", dev_name(dev));
+}
+
 static inline void _check_for_open_devices(void)
 {
-#ifndef NDEBUG
-	struct dev_iter *i = dev_iter_create(NULL);
-	struct device *dev;
-
-	if (!i) {
-		stack;
-		return;
-	}
-
-	while ((dev = dev_iter_get(i))) {
-		if (dev->fd >= 0)
-			log_err("Device '%s' has been left open.",
-				dev_name(dev));
-	}
-
-	dev_iter_destroy(i);
-#endif
+	hash_iterate(_cache.names, _check_closed);
 }
 
 void dev_cache_exit(void)

lib/format1/lvm1_label.c

@@ -99,6 +99,7 @@ static void _destroy(struct labeller *l)
 {
 	struct pool *mem = (struct pool *) l->private;
 	pool_destroy(mem);
+	dbg_free(l);
 }
 
 

tools/commands.h

@@ -348,13 +348,12 @@ xx(vgcfgrestore,
    "\t[-l[l]|--list [--list]]" "\n"
    "\t[-n|--name VolumeGroupName] " "\n"
    "\t[-h|--help]" "\n"
-   "\t[-o|--oldpath OldPhysicalVolumePath] " "\n"
    "\t[-t|--test] " "\n"
    "\t[-v|--verbose]" "\n"
    "\t[--version] " "\n"
-   "[PhysicalVolumePath]\n", 
+   "\tVolumeGroupName",
 
-   file_ARG, list_ARG, name_ARG, oldpath_ARG, test_ARG)
+   file_ARG, list_ARG, name_ARG, test_ARG)
 
 xx(vgchange,
    "Change volume group attributes",

tools/lvm.c

@@ -912,6 +912,7 @@ static void _exit_uuid_map(void)
 	uuid_map_destroy(the_um);
 	label_exit();
 	_lvm1_label->ops->destroy(_lvm1_label);
+	_lvm1_label = NULL;
 }
 
 static int _get_env_vars(void)