30 struct freezer {  struct
36 static inline struct freezer *cgroup_freezer(  in cgroup_freezer()  argument
41 		struct freezer, css);  in cgroup_freezer()
44 static inline struct freezer *task_freezer(struct task_struct *task)  in task_freezer()
47 			    struct freezer, css);  in task_freezer()
52 	struct freezer *freezer;  in cgroup_frozen()  local
56 	freezer = task_freezer(task);  in cgroup_frozen()
57 	state = freezer->state;  in cgroup_frozen()
131 	struct freezer *freezer;  in freezer_create()  local
133 	freezer = kzalloc(sizeof(struct freezer), GFP_KERNEL);  in freezer_create()
134 	if (!freezer)  in freezer_create()
137 	spin_lock_init(&freezer->lock);  in freezer_create()
138 	freezer->state = CGROUP_THAWED;  in freezer_create()
139 	return &freezer->css;  in freezer_create()
164 	struct freezer *freezer;  in freezer_can_attach()  local
184 	freezer = cgroup_freezer(new_cgroup);  in freezer_can_attach()
185 	if (freezer->state == CGROUP_FROZEN)  in freezer_can_attach()
193 	struct freezer *freezer;  in freezer_fork()  local
201 	freezer = task_freezer(task);  in freezer_fork()
207 	if (!freezer->css.cgroup->parent)  in freezer_fork()
210 	spin_lock_irq(&freezer->lock);  in freezer_fork()
211 	BUG_ON(freezer->state == CGROUP_FROZEN);  in freezer_fork()
214 	if (freezer->state == CGROUP_FREEZING)  in freezer_fork()
216 	spin_unlock_irq(&freezer->lock);  in freezer_fork()
223 				 struct freezer *freezer)  in update_freezer_state()  argument
242 		freezer->state = CGROUP_FROZEN;  in update_freezer_state()
244 		freezer->state = CGROUP_FREEZING;  in update_freezer_state()
246 		freezer->state = CGROUP_THAWED;  in update_freezer_state()
253 	struct freezer *freezer;  in freezer_read()  local
259 	freezer = cgroup_freezer(cgroup);  in freezer_read()
260 	spin_lock_irq(&freezer->lock);  in freezer_read()
261 	state = freezer->state;  in freezer_read()
265 		update_freezer_state(cgroup, freezer);  in freezer_read()
266 		state = freezer->state;  in freezer_read()
268 	spin_unlock_irq(&freezer->lock);  in freezer_read()
276 static int try_to_freeze_cgroup(struct cgroup *cgroup, struct freezer *freezer)  in try_to_freeze_cgroup()  argument
282 	freezer->state = CGROUP_FREEZING;  in try_to_freeze_cgroup()
297 static void unfreeze_cgroup(struct cgroup *cgroup, struct freezer *freezer)  in unfreeze_cgroup()  argument
308 	freezer->state = CGROUP_THAWED;  in unfreeze_cgroup()
314 	struct freezer *freezer;  in freezer_change_state()  local
317 	freezer = cgroup_freezer(cgroup);  in freezer_change_state()
319 	spin_lock_irq(&freezer->lock);  in freezer_change_state()
321 	update_freezer_state(cgroup, freezer);  in freezer_change_state()
322 	if (goal_state == freezer->state)  in freezer_change_state()
327 		unfreeze_cgroup(cgroup, freezer);  in freezer_change_state()
330 		retval = try_to_freeze_cgroup(cgroup, freezer);  in freezer_change_state()
336 	spin_unlock_irq(&freezer->lock);  in freezer_change_state()