/* kernel/sched/core.c — context switch */
static void __sched notrace __schedule(unsigned int sched_mode)
{
	struct task_struct *prev, *next;
	unsigned long *switch_count;
	struct rq_flags rf;
	struct rq *rq;
	int cpu;

	cpu = smp_processor_id();
	rq = cpu_rq(cpu);
	prev = rq->curr;

	schedule_debug(prev, !!sched_mode);
	if (sched_feat(HRTICK) || sched_feat(HRTICK_DL))
		hrtick_clear(rq);

	local_irq_disable();
	rcu_note_context_switch(!!sched_mode);

	rq_lock(rq, &rf);
	smp_mb__after_spinlock();

	rq->clock_update_flags <<= 1;
	update_rq_clock(rq);

	next = pick_next_task(rq, prev, &rf);
	clear_tsk_need_resched(prev);
	clear_preempt_need_resched();

	if (likely(prev != next)) {
		rq->nr_switches++;
		rq->curr = next;
		++*switch_count;
		migrate_disable_switch(rq, prev);
		psi_account_irqtime(rq, prev, next);
		rq = context_switch(rq, prev, next, &rf);
	} else {
		rq_unlock_irq(rq, &rf);
	}

	balance_callbacks(rq, head);
}
/* kernel/sched/core.c — context switch */
static void __sched notrace __schedule(unsigned int sched_mode)
{
	struct task_struct *prev, *next;
	unsigned long *switch_count;
	struct rq_flags rf;
	struct rq *rq;
	int cpu;

	cpu = smp_processor_id();
	rq = cpu_rq(cpu);
	prev = rq->curr;

	schedule_debug(prev, !!sched_mode);
	if (sched_feat(HRTICK) || sched_feat(HRTICK_DL))
		hrtick_clear(rq);

	local_irq_disable();
	rcu_note_context_switch(!!sched_mode);

	rq_lock(rq, &rf);
	smp_mb__after_spinlock();

	rq->clock_update_flags <<= 1;
	update_rq_clock(rq);

	next = pick_next_task(rq, prev, &rf);
	clear_tsk_need_resched(prev);
	clear_preempt_need_resched();

	if (likely(prev != next)) {
		rq->nr_switches++;
		rq->curr = next;
		++*switch_count;
		migrate_disable_switch(rq, prev);
		psi_account_irqtime(rq, prev, next);
		rq = context_switch(rq, prev, next, &rf);
	} else {
		rq_unlock_irq(rq, &rf);
	}

	balance_callbacks(rq, head);
}