43 struct freezer {  struct
50 static inline struct freezer *css_freezer(struct cgroup_subsys_state *css)  in css_freezer()  argument
52 	return css ? container_of(css, struct freezer, css) : NULL;  in css_freezer()
55 static inline struct freezer *task_freezer(struct task_struct *task)  in task_freezer()
60 static struct freezer *parent_freezer(struct freezer *freezer)  in parent_freezer()  argument
62 	return css_freezer(freezer->css.parent);  in parent_freezer()
88 	struct freezer *freezer;  in freezer_css_alloc()  local
90 	freezer = kzalloc(sizeof(struct freezer), GFP_KERNEL);  in freezer_css_alloc()
91 	if (!freezer)  in freezer_css_alloc()
94 	return &freezer->css;  in freezer_css_alloc()
107 	struct freezer *freezer = css_freezer(css);  in freezer_css_online()  local
108 	struct freezer *parent = parent_freezer(freezer);  in freezer_css_online()
112 	freezer->state |= CGROUP_FREEZER_ONLINE;  in freezer_css_online()
115 		freezer->state |= CGROUP_FREEZING_PARENT | CGROUP_FROZEN;  in freezer_css_online()
132 	struct freezer *freezer = css_freezer(css);  in freezer_css_offline()  local
136 	if (freezer->state & CGROUP_FREEZING)  in freezer_css_offline()
139 	freezer->state = 0;  in freezer_css_offline()
176 		struct freezer *freezer = css_freezer(new_css);  in freezer_attach()  local
178 		if (!(freezer->state & CGROUP_FREEZING)) {  in freezer_attach()
184 			while (freezer && (freezer->state & CGROUP_FROZEN)) {  in freezer_attach()
185 				freezer->state &= ~CGROUP_FROZEN;  in freezer_attach()
186 				freezer = parent_freezer(freezer);  in freezer_attach()
206 	struct freezer *freezer;  in freezer_fork()  local
221 	freezer = task_freezer(task);  in freezer_fork()
222 	if (freezer->state & CGROUP_FREEZING)  in freezer_fork()
247 	struct freezer *freezer = css_freezer(css);  in update_if_frozen()  local
254 	if (!(freezer->state & CGROUP_FREEZING) ||  in update_if_frozen()
255 	    (freezer->state & CGROUP_FROZEN))  in update_if_frozen()
261 		struct freezer *child = css_freezer(pos);  in update_if_frozen()
279 	freezer->state |= CGROUP_FROZEN;  in update_if_frozen()
311 static void freeze_cgroup(struct freezer *freezer)  in freeze_cgroup()  argument
316 	css_task_iter_start(&freezer->css, 0, &it);  in freeze_cgroup()
322 static void unfreeze_cgroup(struct freezer *freezer)  in unfreeze_cgroup()  argument
327 	css_task_iter_start(&freezer->css, 0, &it);  in unfreeze_cgroup()
342 static void freezer_apply_state(struct freezer *freezer, bool freeze,  in freezer_apply_state()  argument
348 	if (!(freezer->state & CGROUP_FREEZER_ONLINE))  in freezer_apply_state()
352 		if (!(freezer->state & CGROUP_FREEZING))  in freezer_apply_state()
354 		freezer->state |= state;  in freezer_apply_state()
355 		freeze_cgroup(freezer);  in freezer_apply_state()
357 		bool was_freezing = freezer->state & CGROUP_FREEZING;  in freezer_apply_state()
359 		freezer->state &= ~state;  in freezer_apply_state()
361 		if (!(freezer->state & CGROUP_FREEZING)) {  in freezer_apply_state()
362 			freezer->state &= ~CGROUP_FROZEN;  in freezer_apply_state()
365 			unfreeze_cgroup(freezer);  in freezer_apply_state()
378 static void freezer_change_state(struct freezer *freezer, bool freeze)  in freezer_change_state()  argument
389 	css_for_each_descendant_pre(pos, &freezer->css) {  in freezer_change_state()
390 		struct freezer *pos_f = css_freezer(pos);  in freezer_change_state()
391 		struct freezer *parent = parent_freezer(pos_f);  in freezer_change_state()
397 		if (pos_f == freezer)  in freezer_change_state()
433 	struct freezer *freezer = css_freezer(css);  in freezer_self_freezing_read()  local
435 	return (bool)(freezer->state & CGROUP_FREEZING_SELF);  in freezer_self_freezing_read()
441 	struct freezer *freezer = css_freezer(css);  in freezer_parent_freezing_read()  local
443 	return (bool)(freezer->state & CGROUP_FREEZING_PARENT);  in freezer_parent_freezing_read()