28 task_work_add(struct task_struct *task, struct callback_head *work, bool notify)  in task_work_add()  argument
36 		work->next = head;  in task_work_add()
37 	} while (cmpxchg(&task->task_works, head, work) != head);  in task_work_add()
59 	struct callback_head *work;  in task_work_cancel()  local
71 	while ((work = READ_ONCE(*pprev))) {  in task_work_cancel()
72 		if (work->func != func)  in task_work_cancel()
73 			pprev = &work->next;  in task_work_cancel()
74 		else if (cmpxchg(pprev, work, work->next) == work)  in task_work_cancel()
79 	return work;  in task_work_cancel()
93 	struct callback_head *work, *head, *next;  in task_work_run()  local
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()
108 		if (!work)  in task_work_run()
112 			next = work->next;  in task_work_run()
113 			work->func(work);  in task_work_run()
114 			work = next;  in task_work_run()
116 		} while (work);  in task_work_run()