sched: Clean up idle task SMP logic
The idle post_schedule flag is just a vile waste of time, furthermore it appears unneeded, move the idle_enter_fair() call into pick_next_task_idle(). Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Vincent Guittot <vincent.guittot@linaro.org> Cc: alex.shi@linaro.org Cc: mingo@kernel.org Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/n/tip-aljykihtxJt3mkokxi0qZurb@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
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@ -19,11 +19,6 @@ static void pre_schedule_idle(struct rq *rq, struct task_struct *prev)
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idle_exit_fair(rq);
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rq_last_tick_reset(rq);
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}
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static void post_schedule_idle(struct rq *rq)
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{
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idle_enter_fair(rq);
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}
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#endif /* CONFIG_SMP */
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/*
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* Idle tasks are unconditionally rescheduled:
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@ -41,8 +36,7 @@ pick_next_task_idle(struct rq *rq, struct task_struct *prev)
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schedstat_inc(rq, sched_goidle);
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#ifdef CONFIG_SMP
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/* Trigger the post schedule to do an idle_enter for CFS */
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rq->post_schedule = 1;
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idle_enter_fair(rq);
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#endif
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return rq->idle;
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}
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@ -106,7 +100,6 @@ const struct sched_class idle_sched_class = {
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#ifdef CONFIG_SMP
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.select_task_rq = select_task_rq_idle,
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.pre_schedule = pre_schedule_idle,
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.post_schedule = post_schedule_idle,
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#endif
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.set_curr_task = set_curr_task_idle,
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