From f5832c1998af2ca8d9947792d1c8e1816ab58e57 Mon Sep 17 00:00:00 2001
From: Nicolas Pitre <nicolas.pitre@linaro.org>
Date: Mon, 29 May 2017 17:02:57 -0400
Subject: sched/core: Omit building stop_sched_class when !SMP

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>
---
 kernel/sched/sched.h | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'kernel/sched/sched.h')

diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index f1e400c6403c..f2ef759a4cb6 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -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)
 
-- 
cgit