Commit ab3f497a authored by Tejun Heo's avatar Tejun Heo
Browse files

sched_ext: Add @sch to SCX_CALL_OP*()



In preparation of hierarchical scheduling support, make SCX_CALL_OP*() take
explicit @sch instead of assuming scx_root. As scx_root is still the only
scheduler instance, this patch doesn't make any functional changes.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Reviewed-by: default avatarAndrea Righi <arighi@nvidia.com>
parent d310fb40
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+74 −58
Original line number Diff line number Diff line
@@ -1241,30 +1241,30 @@ static inline struct rq *scx_locked_rq(void)
	return __this_cpu_read(locked_rq);
}

#define SCX_CALL_OP(mask, op, rq, args...)					\
#define SCX_CALL_OP(sch, mask, op, rq, args...)					\
do {										\
	update_locked_rq(rq);							\
	if (mask) {								\
		scx_kf_allow(mask);						\
		scx_root->ops.op(args);						\
		(sch)->ops.op(args);						\
		scx_kf_disallow(mask);						\
	} else {								\
		scx_root->ops.op(args);						\
		(sch)->ops.op(args);						\
	}									\
	update_locked_rq(NULL);							\
} while (0)

#define SCX_CALL_OP_RET(mask, op, rq, args...)					\
#define SCX_CALL_OP_RET(sch, mask, op, rq, args...)				\
({										\
	__typeof__(scx_root->ops.op(args)) __ret;				\
	__typeof__((sch)->ops.op(args)) __ret;					\
										\
	update_locked_rq(rq);							\
	if (mask) {								\
		scx_kf_allow(mask);						\
		__ret = scx_root->ops.op(args);					\
		__ret = (sch)->ops.op(args);					\
		scx_kf_disallow(mask);						\
	} else {								\
		__ret = scx_root->ops.op(args);					\
		__ret = (sch)->ops.op(args);					\
	}									\
	update_locked_rq(NULL);							\
	__ret;									\
@@ -1281,31 +1281,31 @@ do { \
 * scx_kf_allowed_on_arg_tasks() to test whether the invocation is allowed on
 * the specific task.
 */
#define SCX_CALL_OP_TASK(mask, op, rq, task, args...)				\
#define SCX_CALL_OP_TASK(sch, mask, op, rq, task, args...)			\
do {										\
	BUILD_BUG_ON((mask) & ~__SCX_KF_TERMINAL);				\
	current->scx.kf_tasks[0] = task;					\
	SCX_CALL_OP(mask, op, rq, task, ##args);				\
	SCX_CALL_OP((sch), mask, op, rq, task, ##args);				\
	current->scx.kf_tasks[0] = NULL;					\
} while (0)

#define SCX_CALL_OP_TASK_RET(mask, op, rq, task, args...)			\
#define SCX_CALL_OP_TASK_RET(sch, mask, op, rq, task, args...)			\
({										\
	__typeof__(scx_root->ops.op(task, ##args)) __ret;			\
	__typeof__((sch)->ops.op(task, ##args)) __ret;				\
	BUILD_BUG_ON((mask) & ~__SCX_KF_TERMINAL);				\
	current->scx.kf_tasks[0] = task;					\
	__ret = SCX_CALL_OP_RET(mask, op, rq, task, ##args);			\
	__ret = SCX_CALL_OP_RET((sch), mask, op, rq, task, ##args);		\
	current->scx.kf_tasks[0] = NULL;					\
	__ret;									\
})

#define SCX_CALL_OP_2TASKS_RET(mask, op, rq, task0, task1, args...)		\
#define SCX_CALL_OP_2TASKS_RET(sch, mask, op, rq, task0, task1, args...)	\
({										\
	__typeof__(scx_root->ops.op(task0, task1, ##args)) __ret;		\
	__typeof__((sch)->ops.op(task0, task1, ##args)) __ret;			\
	BUILD_BUG_ON((mask) & ~__SCX_KF_TERMINAL);				\
	current->scx.kf_tasks[0] = task0;					\
	current->scx.kf_tasks[1] = task1;					\
	__ret = SCX_CALL_OP_RET(mask, op, rq, task0, task1, ##args);		\
	__ret = SCX_CALL_OP_RET((sch), mask, op, rq, task0, task1, ##args);	\
	current->scx.kf_tasks[0] = NULL;					\
	current->scx.kf_tasks[1] = NULL;					\
	__ret;									\
@@ -2246,7 +2246,7 @@ static void do_enqueue_task(struct rq *rq, struct task_struct *p, u64 enq_flags,
	WARN_ON_ONCE(*ddsp_taskp);
	*ddsp_taskp = p;

	SCX_CALL_OP_TASK(SCX_KF_ENQUEUE, enqueue, rq, p, enq_flags);
	SCX_CALL_OP_TASK(sch, SCX_KF_ENQUEUE, enqueue, rq, p, enq_flags);

	*ddsp_taskp = NULL;
	if (p->scx.ddsp_dsq_id != SCX_DSQ_INVALID)
@@ -2342,7 +2342,7 @@ static void enqueue_task_scx(struct rq *rq, struct task_struct *p, int enq_flags
	add_nr_running(rq, 1);

	if (SCX_HAS_OP(sch, runnable) && !task_on_rq_migrating(p))
		SCX_CALL_OP_TASK(SCX_KF_REST, runnable, rq, p, enq_flags);
		SCX_CALL_OP_TASK(sch, SCX_KF_REST, runnable, rq, p, enq_flags);

	if (enq_flags & SCX_ENQ_WAKEUP)
		touch_core_sched(rq, p);
@@ -2378,7 +2378,8 @@ static void ops_dequeue(struct rq *rq, struct task_struct *p, u64 deq_flags)
		BUG();
	case SCX_OPSS_QUEUED:
		if (SCX_HAS_OP(sch, dequeue))
			SCX_CALL_OP_TASK(SCX_KF_REST, dequeue, rq, p, deq_flags);
			SCX_CALL_OP_TASK(sch, SCX_KF_REST, dequeue, rq,
					 p, deq_flags);

		if (atomic_long_try_cmpxchg(&p->scx.ops_state, &opss,
					    SCX_OPSS_NONE))
@@ -2429,11 +2430,11 @@ static bool dequeue_task_scx(struct rq *rq, struct task_struct *p, int deq_flags
	 */
	if (SCX_HAS_OP(sch, stopping) && task_current(rq, p)) {
		update_curr_scx(rq);
		SCX_CALL_OP_TASK(SCX_KF_REST, stopping, rq, p, false);
		SCX_CALL_OP_TASK(sch, SCX_KF_REST, stopping, rq, p, false);
	}

	if (SCX_HAS_OP(sch, quiescent) && !task_on_rq_migrating(p))
		SCX_CALL_OP_TASK(SCX_KF_REST, quiescent, rq, p, deq_flags);
		SCX_CALL_OP_TASK(sch, SCX_KF_REST, quiescent, rq, p, deq_flags);

	if (deq_flags & SCX_DEQ_SLEEP)
		p->scx.flags |= SCX_TASK_DEQD_FOR_SLEEP;
@@ -2454,7 +2455,7 @@ static void yield_task_scx(struct rq *rq)
	struct task_struct *p = rq->curr;

	if (SCX_HAS_OP(sch, yield))
		SCX_CALL_OP_2TASKS_RET(SCX_KF_REST, yield, rq, p, NULL);
		SCX_CALL_OP_2TASKS_RET(sch, SCX_KF_REST, yield, rq, p, NULL);
	else
		p->scx.slice = 0;
}
@@ -2465,7 +2466,8 @@ static bool yield_to_task_scx(struct rq *rq, struct task_struct *to)
	struct task_struct *from = rq->curr;

	if (SCX_HAS_OP(sch, yield))
		return SCX_CALL_OP_2TASKS_RET(SCX_KF_REST, yield, rq, from, to);
		return SCX_CALL_OP_2TASKS_RET(sch, SCX_KF_REST, yield, rq,
					      from, to);
	else
		return false;
}
@@ -3026,7 +3028,8 @@ static int balance_one(struct rq *rq, struct task_struct *prev)
		 * emitted in switch_class().
		 */
		if (SCX_HAS_OP(sch, cpu_acquire))
			SCX_CALL_OP(SCX_KF_REST, cpu_acquire, rq, cpu_of(rq), NULL);
			SCX_CALL_OP(sch, SCX_KF_REST, cpu_acquire, rq,
				    cpu_of(rq), NULL);
		rq->scx.cpu_released = false;
	}

@@ -3072,8 +3075,8 @@ static int balance_one(struct rq *rq, struct task_struct *prev)
	do {
		dspc->nr_tasks = 0;

		SCX_CALL_OP(SCX_KF_DISPATCH, dispatch, rq, cpu_of(rq),
			    prev_on_scx ? prev : NULL);
		SCX_CALL_OP(sch, SCX_KF_DISPATCH, dispatch, rq,
			    cpu_of(rq), prev_on_scx ? prev : NULL);

		flush_dispatch_buf(sch, rq);

@@ -3197,7 +3200,7 @@ static void set_next_task_scx(struct rq *rq, struct task_struct *p, bool first)

	/* see dequeue_task_scx() on why we skip when !QUEUED */
	if (SCX_HAS_OP(sch, running) && (p->scx.flags & SCX_TASK_QUEUED))
		SCX_CALL_OP_TASK(SCX_KF_REST, running, rq, p);
		SCX_CALL_OP_TASK(sch, SCX_KF_REST, running, rq, p);

	clr_task_runnable(p, true);

@@ -3279,7 +3282,8 @@ static void switch_class(struct rq *rq, struct task_struct *next)
				.task = next,
			};

			SCX_CALL_OP(SCX_KF_CPU_RELEASE, cpu_release, rq, cpu_of(rq), &args);
			SCX_CALL_OP(sch, SCX_KF_CPU_RELEASE, cpu_release, rq,
				    cpu_of(rq), &args);
		}
		rq->scx.cpu_released = true;
	}
@@ -3293,7 +3297,7 @@ static void put_prev_task_scx(struct rq *rq, struct task_struct *p,

	/* see dequeue_task_scx() on why we skip when !QUEUED */
	if (SCX_HAS_OP(sch, stopping) && (p->scx.flags & SCX_TASK_QUEUED))
		SCX_CALL_OP_TASK(SCX_KF_REST, stopping, rq, p, true);
		SCX_CALL_OP_TASK(sch, SCX_KF_REST, stopping, rq, p, true);

	if (p->scx.flags & SCX_TASK_QUEUED) {
		set_task_runnable(rq, p);
@@ -3436,7 +3440,8 @@ bool scx_prio_less(const struct task_struct *a, const struct task_struct *b,
	 */
	if (SCX_HAS_OP(sch, core_sched_before) &&
	    !scx_rq_bypassing(task_rq(a)))
		return SCX_CALL_OP_2TASKS_RET(SCX_KF_REST, core_sched_before, NULL,
		return SCX_CALL_OP_2TASKS_RET(sch, SCX_KF_REST, core_sched_before,
					      NULL,
					      (struct task_struct *)a,
					      (struct task_struct *)b);
	else
@@ -3473,8 +3478,10 @@ static int select_task_rq_scx(struct task_struct *p, int prev_cpu, int wake_flag
		WARN_ON_ONCE(*ddsp_taskp);
		*ddsp_taskp = p;

		cpu = SCX_CALL_OP_TASK_RET(SCX_KF_ENQUEUE | SCX_KF_SELECT_CPU,
					   select_cpu, NULL, p, prev_cpu, wake_flags);
		cpu = SCX_CALL_OP_TASK_RET(sch,
					   SCX_KF_ENQUEUE | SCX_KF_SELECT_CPU,
					   select_cpu, NULL, p, prev_cpu,
					   wake_flags);
		p->scx.selected_cpu = cpu;
		*ddsp_taskp = NULL;
		if (ops_cpu_valid(cpu, "from ops.select_cpu()"))
@@ -3520,7 +3527,7 @@ static void set_cpus_allowed_scx(struct task_struct *p,
	 * designation pointless. Cast it away when calling the operation.
	 */
	if (SCX_HAS_OP(sch, set_cpumask))
		SCX_CALL_OP_TASK(SCX_KF_REST, set_cpumask, NULL,
		SCX_CALL_OP_TASK(sch, SCX_KF_REST, set_cpumask, NULL,
				 p, (struct cpumask *)p->cpus_ptr);
}

@@ -3543,9 +3550,9 @@ static void handle_hotplug(struct rq *rq, bool online)
		scx_idle_update_selcpu_topology(&sch->ops);

	if (online && SCX_HAS_OP(sch, cpu_online))
		SCX_CALL_OP(SCX_KF_UNLOCKED, cpu_online, NULL, cpu);
		SCX_CALL_OP(sch, SCX_KF_UNLOCKED, cpu_online, NULL, cpu);
	else if (!online && SCX_HAS_OP(sch, cpu_offline))
		SCX_CALL_OP(SCX_KF_UNLOCKED, cpu_offline, NULL, cpu);
		SCX_CALL_OP(sch, SCX_KF_UNLOCKED, cpu_offline, NULL, cpu);
	else
		scx_exit(SCX_ECODE_ACT_RESTART | SCX_ECODE_RSN_HOTPLUG,
			 "cpu %d going %s, exiting scheduler", cpu,
@@ -3650,7 +3657,7 @@ static void task_tick_scx(struct rq *rq, struct task_struct *curr, int queued)
		curr->scx.slice = 0;
		touch_core_sched(rq, curr);
	} else if (SCX_HAS_OP(sch, tick)) {
		SCX_CALL_OP_TASK(SCX_KF_REST, tick, rq, curr);
		SCX_CALL_OP_TASK(sch, SCX_KF_REST, tick, rq, curr);
	}

	if (!curr->scx.slice)
@@ -3728,7 +3735,8 @@ static int scx_init_task(struct task_struct *p, struct task_group *tg, bool fork
			.fork = fork,
		};

		ret = SCX_CALL_OP_RET(SCX_KF_UNLOCKED, init_task, NULL, p, &args);
		ret = SCX_CALL_OP_RET(sch, SCX_KF_UNLOCKED, init_task, NULL,
				      p, &args);
		if (unlikely(ret)) {
			ret = ops_sanitize_err("init_task", ret);
			return ret;
@@ -3787,11 +3795,12 @@ static void scx_enable_task(struct task_struct *p)
	p->scx.weight = sched_weight_to_cgroup(weight);

	if (SCX_HAS_OP(sch, enable))
		SCX_CALL_OP_TASK(SCX_KF_REST, enable, rq, p);
		SCX_CALL_OP_TASK(sch, SCX_KF_REST, enable, rq, p);
	scx_set_task_state(p, SCX_TASK_ENABLED);

	if (SCX_HAS_OP(sch, set_weight))
		SCX_CALL_OP_TASK(SCX_KF_REST, set_weight, rq, p, p->scx.weight);
		SCX_CALL_OP_TASK(sch, SCX_KF_REST, set_weight, rq,
				 p, p->scx.weight);
}

static void scx_disable_task(struct task_struct *p)
@@ -3803,7 +3812,7 @@ static void scx_disable_task(struct task_struct *p)
	WARN_ON_ONCE(scx_get_task_state(p) != SCX_TASK_ENABLED);

	if (SCX_HAS_OP(sch, disable))
		SCX_CALL_OP_TASK(SCX_KF_REST, disable, rq, p);
		SCX_CALL_OP_TASK(sch, SCX_KF_REST, disable, rq, p);
	scx_set_task_state(p, SCX_TASK_READY);
}

@@ -3833,7 +3842,8 @@ static void scx_exit_task(struct task_struct *p)
	}

	if (SCX_HAS_OP(sch, exit_task))
		SCX_CALL_OP_TASK(SCX_KF_REST, exit_task, task_rq(p), p, &args);
		SCX_CALL_OP_TASK(sch, SCX_KF_REST, exit_task, task_rq(p),
				 p, &args);
	scx_set_task_state(p, SCX_TASK_NONE);
}

@@ -3944,7 +3954,8 @@ static void reweight_task_scx(struct rq *rq, struct task_struct *p,

	p->scx.weight = sched_weight_to_cgroup(scale_load_down(lw->weight));
	if (SCX_HAS_OP(sch, set_weight))
		SCX_CALL_OP_TASK(SCX_KF_REST, set_weight, rq, p, p->scx.weight);
		SCX_CALL_OP_TASK(sch, SCX_KF_REST, set_weight, rq,
				 p, p->scx.weight);
}

static void prio_changed_scx(struct rq *rq, struct task_struct *p, int oldprio)
@@ -3962,7 +3973,7 @@ static void switching_to_scx(struct rq *rq, struct task_struct *p)
	 * different scheduler class. Keep the BPF scheduler up-to-date.
	 */
	if (SCX_HAS_OP(sch, set_cpumask))
		SCX_CALL_OP_TASK(SCX_KF_REST, set_cpumask, rq,
		SCX_CALL_OP_TASK(sch, SCX_KF_REST, set_cpumask, rq,
				 p, (struct cpumask *)p->cpus_ptr);
}

@@ -4025,8 +4036,8 @@ int scx_tg_online(struct task_group *tg)
			struct scx_cgroup_init_args args =
				{ .weight = tg->scx_weight };

			ret = SCX_CALL_OP_RET(SCX_KF_UNLOCKED, cgroup_init, NULL,
					      tg->css.cgroup, &args);
			ret = SCX_CALL_OP_RET(sch, SCX_KF_UNLOCKED, cgroup_init,
					      NULL, tg->css.cgroup, &args);
			if (ret)
				ret = ops_sanitize_err("cgroup_init", ret);
		}
@@ -4050,7 +4061,8 @@ void scx_tg_offline(struct task_group *tg)

	if (scx_cgroup_enabled && SCX_HAS_OP(sch, cgroup_exit) &&
	    (tg->scx_flags & SCX_TG_INITED))
		SCX_CALL_OP(SCX_KF_UNLOCKED, cgroup_exit, NULL, tg->css.cgroup);
		SCX_CALL_OP(sch, SCX_KF_UNLOCKED, cgroup_exit, NULL,
			    tg->css.cgroup);
	tg->scx_flags &= ~(SCX_TG_ONLINE | SCX_TG_INITED);

	percpu_up_read(&scx_cgroup_rwsem);
@@ -4084,7 +4096,8 @@ int scx_cgroup_can_attach(struct cgroup_taskset *tset)
			continue;

		if (SCX_HAS_OP(sch, cgroup_prep_move)) {
			ret = SCX_CALL_OP_RET(SCX_KF_UNLOCKED, cgroup_prep_move, NULL,
			ret = SCX_CALL_OP_RET(sch, SCX_KF_UNLOCKED,
					      cgroup_prep_move, NULL,
					      p, from, css->cgroup);
			if (ret)
				goto err;
@@ -4099,7 +4112,7 @@ int scx_cgroup_can_attach(struct cgroup_taskset *tset)
	cgroup_taskset_for_each(p, css, tset) {
		if (SCX_HAS_OP(sch, cgroup_cancel_move) &&
		    p->scx.cgrp_moving_from)
			SCX_CALL_OP(SCX_KF_UNLOCKED, cgroup_cancel_move, NULL,
			SCX_CALL_OP(sch, SCX_KF_UNLOCKED, cgroup_cancel_move, NULL,
				    p, p->scx.cgrp_moving_from, css->cgroup);
		p->scx.cgrp_moving_from = NULL;
	}
@@ -4121,8 +4134,9 @@ void scx_cgroup_move_task(struct task_struct *p)
	 */
	if (SCX_HAS_OP(sch, cgroup_move) &&
	    !WARN_ON_ONCE(!p->scx.cgrp_moving_from))
		SCX_CALL_OP_TASK(SCX_KF_UNLOCKED, cgroup_move, NULL,
				 p, p->scx.cgrp_moving_from, tg_cgrp(task_group(p)));
		SCX_CALL_OP_TASK(sch, SCX_KF_UNLOCKED, cgroup_move, NULL,
				 p, p->scx.cgrp_moving_from,
				 tg_cgrp(task_group(p)));
	p->scx.cgrp_moving_from = NULL;
}

@@ -4143,7 +4157,7 @@ void scx_cgroup_cancel_attach(struct cgroup_taskset *tset)
	cgroup_taskset_for_each(p, css, tset) {
		if (SCX_HAS_OP(sch, cgroup_cancel_move) &&
		    p->scx.cgrp_moving_from)
			SCX_CALL_OP(SCX_KF_UNLOCKED, cgroup_cancel_move, NULL,
			SCX_CALL_OP(sch, SCX_KF_UNLOCKED, cgroup_cancel_move, NULL,
				    p, p->scx.cgrp_moving_from, css->cgroup);
		p->scx.cgrp_moving_from = NULL;
	}
@@ -4159,7 +4173,7 @@ void scx_group_set_weight(struct task_group *tg, unsigned long weight)

	if (scx_cgroup_enabled && tg->scx_weight != weight) {
		if (SCX_HAS_OP(sch, cgroup_set_weight))
			SCX_CALL_OP(SCX_KF_UNLOCKED, cgroup_set_weight, NULL,
			SCX_CALL_OP(sch, SCX_KF_UNLOCKED, cgroup_set_weight, NULL,
				    tg_cgrp(tg), weight);
		tg->scx_weight = weight;
	}
@@ -4326,7 +4340,8 @@ static void scx_cgroup_exit(struct scx_sched *sch)
			continue;
		rcu_read_unlock();

		SCX_CALL_OP(SCX_KF_UNLOCKED, cgroup_exit, NULL, css->cgroup);
		SCX_CALL_OP(sch, SCX_KF_UNLOCKED, cgroup_exit, NULL,
			    css->cgroup);

		rcu_read_lock();
		css_put(css);
@@ -4363,7 +4378,7 @@ static int scx_cgroup_init(struct scx_sched *sch)
			continue;
		rcu_read_unlock();

		ret = SCX_CALL_OP_RET(SCX_KF_UNLOCKED, cgroup_init, NULL,
		ret = SCX_CALL_OP_RET(sch, SCX_KF_UNLOCKED, cgroup_init, NULL,
				      css->cgroup, &args);
		if (ret) {
			css_put(css);
@@ -4892,7 +4907,7 @@ static void scx_disable_workfn(struct kthread_work *work)
	}

	if (sch->ops.exit)
		SCX_CALL_OP(SCX_KF_UNLOCKED, exit, NULL, ei);
		SCX_CALL_OP(sch, SCX_KF_UNLOCKED, exit, NULL, ei);

	cancel_delayed_work_sync(&scx_watchdog_work);

@@ -5079,7 +5094,7 @@ static void scx_dump_task(struct seq_buf *s, struct scx_dump_ctx *dctx,

	if (SCX_HAS_OP(sch, dump_task)) {
		ops_dump_init(s, "    ");
		SCX_CALL_OP(SCX_KF_REST, dump_task, NULL, dctx, p);
		SCX_CALL_OP(sch, SCX_KF_REST, dump_task, NULL, dctx, p);
		ops_dump_exit();
	}

@@ -5127,7 +5142,7 @@ static void scx_dump_state(struct scx_exit_info *ei, size_t dump_len)

	if (SCX_HAS_OP(sch, dump)) {
		ops_dump_init(&s, "");
		SCX_CALL_OP(SCX_KF_UNLOCKED, dump, NULL, &dctx);
		SCX_CALL_OP(sch, SCX_KF_UNLOCKED, dump, NULL, &dctx);
		ops_dump_exit();
	}

@@ -5184,7 +5199,8 @@ static void scx_dump_state(struct scx_exit_info *ei, size_t dump_len)
		used = seq_buf_used(&ns);
		if (SCX_HAS_OP(sch, dump_cpu)) {
			ops_dump_init(&ns, "  ");
			SCX_CALL_OP(SCX_KF_REST, dump_cpu, NULL, &dctx, cpu, idle);
			SCX_CALL_OP(sch, SCX_KF_REST, dump_cpu, NULL,
				    &dctx, cpu, idle);
			ops_dump_exit();
		}

@@ -5463,7 +5479,7 @@ static int scx_enable(struct sched_ext_ops *ops, struct bpf_link *link)
	scx_idle_enable(ops);

	if (sch->ops.init) {
		ret = SCX_CALL_OP_RET(SCX_KF_UNLOCKED, init, NULL);
		ret = SCX_CALL_OP_RET(sch, SCX_KF_UNLOCKED, init, NULL);
		if (ret) {
			ret = ops_sanitize_err("init", ret);
			cpus_read_unlock();
+1 −1
Original line number Diff line number Diff line
@@ -746,7 +746,7 @@ void __scx_update_idle(struct rq *rq, bool idle, bool do_notify)
	 * managed by put_prev_task_idle()/set_next_task_idle().
	 */
	if (SCX_HAS_OP(sch, update_idle) && do_notify && !scx_rq_bypassing(rq))
		SCX_CALL_OP(SCX_KF_REST, update_idle, rq, cpu_of(rq), idle);
		SCX_CALL_OP(sch, SCX_KF_REST, update_idle, rq, cpu_of(rq), idle);

	/*
	 * Update the idle masks: