Commit afa70d94 authored Jan 20, 2020 by Viresh Kumar Committed by Ingo Molnar Jan 20, 2020

sched/fair: Define sched_idle_cpu() only for SMP configurations

sched_idle_cpu() isn't used for non SMP configuration and with a recent
change, we have started getting following warning:

kernel/sched/fair.c:5221:12: warning: ‘sched_idle_cpu’ defined but not used [-Wunused-function]

Fix that by defining sched_idle_cpu() only for SMP configurations.

Fixes: 323af6de ("sched/fair: Load balance aggressively for SCHED_IDLE CPUs")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Link: https://lore.kernel.org/r/f0554f590687478b33914a4aff9f0e6a62886d44.1579499907.git.viresh.kumar@linaro.org

parent ccf74128

kernel/sched/fair.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -5218,10 +5218,12 @@ static int sched_idle_rq(struct rq *rq)
		rq->nr_running);
		}

		#ifdef CONFIG_SMP
		static int sched_idle_cpu(int cpu)
		{
		return sched_idle_rq(cpu_rq(cpu));
		}
		#endif

		/*
		* The enqueue_task method is called before nr_running is