73 static struct pids_cgroup *parent_pids(struct pids_cgroup *pids)  in parent_pids()  argument
75 	return css_pids(pids->css.parent);  in parent_pids()
81 	struct pids_cgroup *pids;  in pids_css_alloc()  local
83 	pids = kzalloc(sizeof(struct pids_cgroup), GFP_KERNEL);  in pids_css_alloc()
84 	if (!pids)  in pids_css_alloc()
87 	atomic64_set(&pids->limit, PIDS_MAX);  in pids_css_alloc()
88 	return &pids->css;  in pids_css_alloc()
114 static void pids_cancel(struct pids_cgroup *pids, int num)  in pids_cancel()  argument
120 	WARN_ON_ONCE(atomic64_add_negative(-num, &pids->counter));  in pids_cancel()
128 static void pids_uncharge(struct pids_cgroup *pids, int num)  in pids_uncharge()  argument
132 	for (p = pids; parent_pids(p); p = parent_pids(p))  in pids_uncharge()
145 static void pids_charge(struct pids_cgroup *pids, int num)  in pids_charge()  argument
149 	for (p = pids; parent_pids(p); p = parent_pids(p)) {  in pids_charge()
166 static int pids_try_charge(struct pids_cgroup *pids, int num, struct pids_cgroup **fail)  in pids_try_charge()  argument
170 	for (p = pids; parent_pids(p); p = parent_pids(p)) {  in pids_try_charge()
193 	for (q = pids; q != p; q = parent_pids(q))  in pids_try_charge()
206 		struct pids_cgroup *pids = css_pids(dst_css);  in pids_can_attach()  local
218 		pids_charge(pids, 1);  in pids_can_attach()
231 		struct pids_cgroup *pids = css_pids(dst_css);  in pids_cancel_attach()  local
239 		pids_uncharge(pids, 1);  in pids_cancel_attach()
275 	struct pids_cgroup *pids, *pids_over_limit;  in pids_can_fork()  local
278 	pids = css_pids(cset->subsys[pids_cgrp_id]);  in pids_can_fork()
279 	err = pids_try_charge(pids, 1, &pids_over_limit);  in pids_can_fork()
281 		pids_event(pids, pids_over_limit);  in pids_can_fork()
288 	struct pids_cgroup *pids;  in pids_cancel_fork()  local
290 	pids = css_pids(cset->subsys[pids_cgrp_id]);  in pids_cancel_fork()
291 	pids_uncharge(pids, 1);  in pids_cancel_fork()
296 	struct pids_cgroup *pids = css_pids(task_css(task, pids_cgrp_id));  in pids_release()  local
298 	pids_uncharge(pids, 1);  in pids_release()
305 	struct pids_cgroup *pids = css_pids(css);  in pids_max_write()  local
327 	atomic64_set(&pids->limit, limit);  in pids_max_write()
334 	struct pids_cgroup *pids = css_pids(css);  in pids_max_show()  local
335 	int64_t limit = atomic64_read(&pids->limit);  in pids_max_show()
348 	struct pids_cgroup *pids = css_pids(css);  in pids_current_read()  local
350 	return atomic64_read(&pids->counter);  in pids_current_read()
356 	struct pids_cgroup *pids = css_pids(css);  in pids_peak_read()  local
358 	return READ_ONCE(pids->watermark);  in pids_peak_read()
363 	struct pids_cgroup *pids = css_pids(seq_css(sf));  in __pids_events_show()  local
372 	events = local ? pids->events_local : pids->events;  in __pids_events_show()