44 struct freezer {  struct
51 static inline struct freezer *css_freezer(struct cgroup_subsys_state *css)  in css_freezer()  argument
53 	return css ? container_of(css, struct freezer, css) : NULL;  in css_freezer()
56 static inline struct freezer *task_freezer(struct task_struct *task)  in task_freezer()
61 static struct freezer *parent_freezer(struct freezer *freezer)  in parent_freezer()  argument
63 	return css_freezer(freezer->css.parent);  in parent_freezer()
95 	struct freezer *freezer;  in freezer_css_alloc()  local
97 	freezer = kzalloc(sizeof(struct freezer), GFP_KERNEL);  in freezer_css_alloc()
98 	if (!freezer)  in freezer_css_alloc()
101 	return &freezer->css;  in freezer_css_alloc()
114 	struct freezer *freezer = css_freezer(css);  in freezer_css_online()  local
115 	struct freezer *parent = parent_freezer(freezer);  in freezer_css_online()
120 	freezer->state |= CGROUP_FREEZER_ONLINE;  in freezer_css_online()
123 		freezer->state |= CGROUP_FREEZING_PARENT | CGROUP_FROZEN;  in freezer_css_online()
141 	struct freezer *freezer = css_freezer(css);  in freezer_css_offline()  local
146 	if (freezer->state & CGROUP_FREEZING)  in freezer_css_offline()
149 	freezer->state = 0;  in freezer_css_offline()
187 		struct freezer *freezer = css_freezer(new_css);  in freezer_attach()  local
189 		if (!(freezer->state & CGROUP_FREEZING)) {  in freezer_attach()
195 			while (freezer && (freezer->state & CGROUP_FROZEN)) {  in freezer_attach()
196 				freezer->state &= ~CGROUP_FROZEN;  in freezer_attach()
197 				freezer = parent_freezer(freezer);  in freezer_attach()
217 	struct freezer *freezer;  in freezer_fork()  local
232 	freezer = task_freezer(task);  in freezer_fork()
233 	if (freezer->state & CGROUP_FREEZING)  in freezer_fork()
258 	struct freezer *freezer = css_freezer(css);  in update_if_frozen()  local
265 	if (!(freezer->state & CGROUP_FREEZING) ||  in update_if_frozen()
266 	    (freezer->state & CGROUP_FROZEN))  in update_if_frozen()
272 		struct freezer *child = css_freezer(pos);  in update_if_frozen()
290 	freezer->state |= CGROUP_FROZEN;  in update_if_frozen()
322 static void freeze_cgroup(struct freezer *freezer)  in freeze_cgroup()  argument
327 	css_task_iter_start(&freezer->css, 0, &it);  in freeze_cgroup()
333 static void unfreeze_cgroup(struct freezer *freezer)  in unfreeze_cgroup()  argument
338 	css_task_iter_start(&freezer->css, 0, &it);  in unfreeze_cgroup()
353 static void freezer_apply_state(struct freezer *freezer, bool freeze,  in freezer_apply_state()  argument
359 	if (!(freezer->state & CGROUP_FREEZER_ONLINE))  in freezer_apply_state()
363 		if (!(freezer->state & CGROUP_FREEZING))  in freezer_apply_state()
365 		freezer->state |= state;  in freezer_apply_state()
366 		freeze_cgroup(freezer);  in freezer_apply_state()
368 		bool was_freezing = freezer->state & CGROUP_FREEZING;  in freezer_apply_state()
370 		freezer->state &= ~state;  in freezer_apply_state()
372 		if (!(freezer->state & CGROUP_FREEZING)) {  in freezer_apply_state()
373 			freezer->state &= ~CGROUP_FROZEN;  in freezer_apply_state()
376 			unfreeze_cgroup(freezer);  in freezer_apply_state()
389 static void freezer_change_state(struct freezer *freezer, bool freeze)  in freezer_change_state()  argument
401 	css_for_each_descendant_pre(pos, &freezer->css) {  in freezer_change_state()
402 		struct freezer *pos_f = css_freezer(pos);  in freezer_change_state()
403 		struct freezer *parent = parent_freezer(pos_f);  in freezer_change_state()
409 		if (pos_f == freezer)  in freezer_change_state()
446 	struct freezer *freezer = css_freezer(css);  in freezer_self_freezing_read()  local
448 	return (bool)(freezer->state & CGROUP_FREEZING_SELF);  in freezer_self_freezing_read()
454 	struct freezer *freezer = css_freezer(css);  in freezer_parent_freezing_read()  local
456 	return (bool)(freezer->state & CGROUP_FREEZING_PARENT);  in freezer_parent_freezing_read()