40 	 * hierarchy = NULL  in create_ruleset()
243 static inline void get_hierarchy(struct landlock_hierarchy *const hierarchy)  in get_hierarchy()  argument
245 	if (hierarchy)  in get_hierarchy()
246 		refcount_inc(&hierarchy->usage);  in get_hierarchy()
249 static void put_hierarchy(struct landlock_hierarchy *hierarchy)  in put_hierarchy()  argument
251 	while (hierarchy && refcount_dec_and_test(&hierarchy->usage)) {  in put_hierarchy()
252 		const struct landlock_hierarchy *const freeme = hierarchy;  in put_hierarchy()
254 		hierarchy = hierarchy->parent;  in put_hierarchy()
270 	if (WARN_ON_ONCE(!dst || !dst->hierarchy))  in merge_ruleset()
343 	if (WARN_ON_ONCE(!parent->hierarchy)) {  in inherit_ruleset()
347 	get_hierarchy(parent->hierarchy);  in inherit_ruleset()
348 	child->hierarchy->parent = parent->hierarchy;  in inherit_ruleset()
364 	put_hierarchy(ruleset->hierarchy);  in free_ruleset()
424 	new_dom->hierarchy = kzalloc(sizeof(*new_dom->hierarchy),  in landlock_merge_ruleset()
426 	if (!new_dom->hierarchy) {  in landlock_merge_ruleset()
430 	refcount_set(&new_dom->hierarchy->usage, 1);  in landlock_merge_ruleset()