28 task_work_add(struct task_struct *task, struct callback_head *work, bool notify)  in task_work_add()  argument
33 		head = READ_ONCE(task->task_works);  in task_work_add()
37 	} while (cmpxchg(&task->task_works, head, work) != head);  in task_work_add()
40 		set_notify_resume(task);  in task_work_add()
56 task_work_cancel(struct task_struct *task, task_work_func_t func)  in task_work_cancel()  argument
58 	struct callback_head **pprev = &task->task_works;  in task_work_cancel()
62 	if (likely(!task->task_works))  in task_work_cancel()
70 	raw_spin_lock_irqsave(&task->pi_lock, flags);  in task_work_cancel()
77 	raw_spin_unlock_irqrestore(&task->pi_lock, flags);  in task_work_cancel()
92 	struct task_struct *task = current;  in task_work_run()  local
100 		raw_spin_lock_irq(&task->pi_lock);  in task_work_run()
102 			work = READ_ONCE(task->task_works);  in task_work_run()
103 			head = !work && (task->flags & PF_EXITING) ?  in task_work_run()
105 		} while (cmpxchg(&task->task_works, work, head) != work);  in task_work_run()
106 		raw_spin_unlock_irq(&task->pi_lock);  in task_work_run()