sched/smp: Use the SMP version of sched_update_asym_prefer_cpu()

Simplify the scheduler by making CONFIG_SMP=y code in
sched_update_asym_prefer_cpu() unconditional.

Signed-off-by: Ingo Molnar <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Cc: Dietmar Eggemann <[email protected]>
Cc: Juri Lelli <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Sebastian Andrzej Siewior <[email protected]>
Cc: Shrikanth Hegde <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Valentin Schneider <[email protected]>
Cc: Vincent Guittot <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: Ingo Molnar

kernel/sched/topology.c

@@ -1323,7 +1323,6 @@ static void init_sched_groups_capacity(int cpu, struct sched_domain *sd)
 /* Update the "asym_prefer_cpu" when arch_asym_cpu_priority() changes. */
 void sched_update_asym_prefer_cpu(int cpu, int old_prio, int new_prio)
 {
-#ifdef CONFIG_SMP
 	int asym_prefer_cpu = cpu;
 	struct sched_domain *sd;
 
@@ -1373,7 +1372,6 @@ void sched_update_asym_prefer_cpu(int cpu, int old_prio, int new_prio)
 
 		WRITE_ONCE(sg->asym_prefer_cpu, asym_prefer_cpu);
 	}
-#endif /* CONFIG_SMP */
 }
 
 /*