427 	if (unlikely(cmpxchg_relaxed(&node->next, NULL, WAKE_Q_TAIL)))  in __wake_q_add()
434 	head->lastp = &node->next;  in __wake_q_add()
489 		node = node->next;  in wake_up_q()
490 		task->wake_q.next = NULL;  in wake_up_q()
3041 				   struct task_struct *next)  in __fire_sched_out_preempt_notifiers()  argument
3046 		notifier->ops->sched_out(notifier, next);  in __fire_sched_out_preempt_notifiers()
3051 				 struct task_struct *next)  in fire_sched_out_preempt_notifiers()  argument
3054 		__fire_sched_out_preempt_notifiers(curr, next);  in fire_sched_out_preempt_notifiers()
3065 				 struct task_struct *next)  in fire_sched_out_preempt_notifiers()  argument
3071 static inline void prepare_task(struct task_struct *next)  in prepare_task()  argument
3078 	next->on_cpu = 1;  in prepare_task()
3100 prepare_lock_switch(struct rq *rq, struct task_struct *next, struct rq_flags *rf)  in prepare_lock_switch()  argument
3112 	rq->lock.owner = next;  in prepare_lock_switch()
3132 # define prepare_arch_switch(next)	do { } while (0)  argument
3154 		    struct task_struct *next)  in prepare_task_switch()  argument
3157 	sched_info_switch(rq, prev, next);  in prepare_task_switch()
3158 	perf_event_task_sched_out(prev, next);  in prepare_task_switch()
3160 	fire_sched_out_preempt_notifiers(prev, next);  in prepare_task_switch()
3161 	prepare_task(next);  in prepare_task_switch()
3162 	prepare_arch_switch(next);  in prepare_task_switch()
3270 	struct callback_head *head, *next;  in __balance_callback()  local
3279 		next = head->next;  in __balance_callback()
3280 		head->next = NULL;  in __balance_callback()
3281 		head = next;  in __balance_callback()
3335 	       struct task_struct *next, struct rq_flags *rf)  in context_switch()  argument
3337 	prepare_task_switch(rq, prev, next);  in context_switch()
3353 	if (!next->mm) {                                // to kernel  in context_switch()
3354 		enter_lazy_tlb(prev->active_mm, next);  in context_switch()
3356 		next->active_mm = prev->active_mm;  in context_switch()
3362 		membarrier_switch_mm(rq, prev->active_mm, next->mm);  in context_switch()
3371 		switch_mm_irqs_off(prev->active_mm, next->mm, next);  in context_switch()
3382 	prepare_lock_switch(rq, next, rf);  in context_switch()
3385 	switch_to(prev, next, prev);  in context_switch()
4001 	struct task_struct *prev, *next;  in __schedule()  local
4049 	next = pick_next_task(rq, prev, &rf);  in __schedule()
4053 	if (likely(prev != next)) {  in __schedule()
4059 		RCU_INIT_POINTER(rq->curr, next);  in __schedule()
4076 		trace_sched_switch(preempt, prev, next);  in __schedule()
4079 		rq = context_switch(rq, prev, next, &rf);  in __schedule()
6211 	struct task_struct *next;  in __pick_migrate_task()  local
6214 		next = class->pick_next_task(rq, NULL, NULL);  in __pick_migrate_task()
6215 		if (next) {  in __pick_migrate_task()
6216 			next->sched_class->put_prev_task(rq, next);  in __pick_migrate_task()
6217 			return next;  in __pick_migrate_task()
6236 	struct task_struct *next, *stop = rq->stop;  in migrate_tasks()  local
6266 		next = __pick_migrate_task(rq);  in migrate_tasks()
6278 		raw_spin_lock(&next->pi_lock);  in migrate_tasks()
6286 		if (WARN_ON(task_rq(next) != rq || !task_on_rq_queued(next))) {  in migrate_tasks()
6287 			raw_spin_unlock(&next->pi_lock);  in migrate_tasks()
6292 		dest_cpu = select_fallback_rq(dead_rq->cpu, next);  in migrate_tasks()
6293 		rq = __migrate_task(rq, rf, next, dest_cpu);  in migrate_tasks()
6300 		raw_spin_unlock(&next->pi_lock);  in migrate_tasks()