41 bool freezing_slow_path(struct task_struct *p)  in freezing_slow_path()  argument
43 	if (p->flags & (PF_NOFREEZE | PF_SUSPEND_TASK))  in freezing_slow_path()
46 	if (test_tsk_thread_flag(p, TIF_MEMDIE))  in freezing_slow_path()
49 	if (pm_nosig_freezing || cgroup_freezing(p))  in freezing_slow_path()
52 	if (pm_freezing && !(p->flags & PF_KTHREAD))  in freezing_slow_path()
59 bool frozen(struct task_struct *p)  in frozen()  argument
61 	return READ_ONCE(p->__state) & TASK_FROZEN;  in frozen()
102 static void fake_signal_wake_up(struct task_struct *p)  in fake_signal_wake_up()  argument
106 	if (lock_task_sighand(p, &flags)) {  in fake_signal_wake_up()
107 		signal_wake_up(p, 0);  in fake_signal_wake_up()
108 		unlock_task_sighand(p, &flags);  in fake_signal_wake_up()
112 static int __set_task_frozen(struct task_struct *p, void *arg)  in __set_task_frozen()  argument
114 	unsigned int state = READ_ONCE(p->__state);  in __set_task_frozen()
121 	if (task_is_runnable(p))  in __set_task_frozen()
124 	if (p != current && task_curr(p))  in __set_task_frozen()
142 		WARN_ON_ONCE(debug_locks && p->lockdep_depth);  in __set_task_frozen()
145 	p->saved_state = p->__state;  in __set_task_frozen()
146 	WRITE_ONCE(p->__state, TASK_FROZEN);  in __set_task_frozen()
150 static bool __freeze_task(struct task_struct *p)  in __freeze_task()  argument
153 	return task_call_func(p, __set_task_frozen, NULL);  in __freeze_task()
167 bool freeze_task(struct task_struct *p)  in freeze_task()  argument
172 	if (!freezing(p) || frozen(p) || __freeze_task(p)) {  in freeze_task()
177 	if (!(p->flags & PF_KTHREAD))  in freeze_task()
178 		fake_signal_wake_up(p);  in freeze_task()
180 		wake_up_state(p, TASK_NORMAL);  in freeze_task()
193 static int __restore_freezer_state(struct task_struct *p, void *arg)  in __restore_freezer_state()  argument
195 	unsigned int state = p->saved_state;  in __restore_freezer_state()
198 		WRITE_ONCE(p->__state, state);  in __restore_freezer_state()
199 		p->saved_state = TASK_RUNNING;  in __restore_freezer_state()
206 void __thaw_task(struct task_struct *p)  in __thaw_task()  argument
209 	if (frozen(p) && !task_call_func(p, __restore_freezer_state, NULL))  in __thaw_task()
210 		wake_up_state(p, TASK_FROZEN);  in __thaw_task()