21  * they define the ss->css_rstat_flush callback.
25 	return css_is_self(css) || css->ss->css_rstat_flush != NULL;  in css_uses_rstat()
40 static spinlock_t *ss_rstat_lock(struct cgroup_subsys *ss)  in ss_rstat_lock()  argument
42 	if (ss)  in ss_rstat_lock()
43 		return &ss->rstat_ss_lock;  in ss_rstat_lock()
48 static inline struct llist_head *ss_lhead_cpu(struct cgroup_subsys *ss, int cpu)  in ss_lhead_cpu()  argument
50 	if (ss)  in ss_lhead_cpu()
51 		return per_cpu_ptr(ss->lhead, cpu);  in ss_lhead_cpu()
60  * Atomically inserts the css in the ss's llist for the given cpu. This is
61  * reentrant safe i.e. safe against softirq, hardirq and nmi. The ss's llist
121 	lhead = ss_lhead_cpu(css->ss, cpu);  in css_rstat_updated()
154 static void css_process_update_tree(struct cgroup_subsys *ss, int cpu)  in css_process_update_tree()  argument
156 	struct llist_head *lhead = ss_lhead_cpu(ss, cpu);  in css_process_update_tree()
211 	lockdep_assert_held(ss_rstat_lock(head->ss));  in css_rstat_push_children()
284 	css_process_update_tree(root->ss, cpu);  in css_rstat_updated_list()
357 	__acquires(ss_rstat_lock(css->ss))  in __css_rstat_lock()
363 	lock = ss_rstat_lock(css->ss);  in __css_rstat_lock()
374 	__releases(ss_rstat_lock(css->ss))  in __css_rstat_unlock()
379 	lock = ss_rstat_lock(css->ss);  in __css_rstat_unlock()
422 				pos->ss->css_rstat_flush(pos, cpu);  in css_rstat_flush()
443 	} else if (css->ss->css_rstat_flush == NULL)  in css_rstat_init()
509  * @ss: target subsystem
511  * If @ss is NULL, the static locks associated with the base stats
512  * are initialized. If @ss is non-NULL, the subsystem-specific locks
515 int __init ss_rstat_init(struct cgroup_subsys *ss)  in ss_rstat_init()  argument
519 	if (ss) {  in ss_rstat_init()
520 		ss->lhead = alloc_percpu(struct llist_head);  in ss_rstat_init()
521 		if (!ss->lhead)  in ss_rstat_init()
525 	spin_lock_init(ss_rstat_lock(ss));  in ss_rstat_init()
527 		init_llist_head(ss_lhead_cpu(ss, cpu));  in ss_rstat_init()