From afa70d941f663c69c9a64ec1021bbcfa82f0e54a Mon Sep 17 00:00:00 2001 From: Viresh Kumar Date: Mon, 20 Jan 2020 11:29:05 +0530 Subject: [PATCH] sched/fair: Define sched_idle_cpu() only for SMP configurations MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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: 323af6deaf70 ("sched/fair: Load balance aggressively for SCHED_IDLE CPUs") Reported-by: Stephen Rothwell Signed-off-by: Viresh Kumar Signed-off-by: Ingo Molnar Cc: Juri Lelli Cc: Vincent Guittot Cc: Dietmar Eggemann Link: https://lore.kernel.org/r/f0554f590687478b33914a4aff9f0e6a62886d44.1579499907.git.viresh.kumar@linaro.org --- kernel/sched/fair.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index ebf50955fe8a..fe4e0d775375 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -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 -- 2.20.1