32 int task_work_add(struct task_struct *task, struct callback_head *work,  in task_work_add()  argument
41 		head = READ_ONCE(task->task_works);  in task_work_add()
45 	} while (cmpxchg(&task->task_works, head, work) != head);  in task_work_add()
51 		set_notify_resume(task);  in task_work_add()
54 		set_notify_signal(task);  in task_work_add()
74 task_work_cancel_match(struct task_struct *task,  in task_work_cancel_match()  argument
78 	struct callback_head **pprev = &task->task_works;  in task_work_cancel_match()
82 	if (likely(!task->task_works))  in task_work_cancel_match()
90 	raw_spin_lock_irqsave(&task->pi_lock, flags);  in task_work_cancel_match()
97 	raw_spin_unlock_irqrestore(&task->pi_lock, flags);  in task_work_cancel_match()
119 task_work_cancel(struct task_struct *task, task_work_func_t func)  in task_work_cancel()  argument
121 	return task_work_cancel_match(task, task_work_func_match, func);  in task_work_cancel()
134 	struct task_struct *task = current;  in task_work_run()  local
144 			work = READ_ONCE(task->task_works);  in task_work_run()
146 				if (task->flags & PF_EXITING)  in task_work_run()
151 		} while (cmpxchg(&task->task_works, work, head) != work);  in task_work_run()
160 		raw_spin_lock_irq(&task->pi_lock);  in task_work_run()
161 		raw_spin_unlock_irq(&task->pi_lock);  in task_work_run()