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sched/core: Omit building stop_sched_class when !SMP

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The stop class is invoked through stop_machine only.
This is dead code on UP builds.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20170529210302.26868-3-nicolas.pitre@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Nicolas Pitre
2017-05-29 17:02:57 -04:00
committed by Ingo Molnar
parent 3effcb4247
commit f5832c1998
3 changed files with 36 additions and 32 deletions
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4
kernel/sched/sched.h
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@@ -1453,7 +1453,11 @@ static inline void set_curr_task(struct rq *rq, struct task_struct *curr)
curr->sched_class->set_curr_task(rq);
}
#ifdef CONFIG_SMP
#define sched_class_highest (&stop_sched_class)
#else
#define sched_class_highest (&dl_sched_class)
#endif
#define for_each_class(class) \
for (class = sched_class_highest; class; class = class->next)