sched: add CONFIG_SMP consistency

a patch from Henrik Austad did this:

>> Do not declare select_task_rq as part of sched_class when CONFIG_SMP is
>> not set.

Peter observed:

> While a proper cleanup, could you do it by re-arranging the methods so
> as to not create an additional ifdef?

Do not declare select_task_rq and some other methods as part of sched_class
when CONFIG_SMP is not set.

Also gather those methods to avoid CONFIG_SMP mess.

Idea-by: Henrik Austad <henrik.austad@gmail.com>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Henrik Austad <henrik@austad.us>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 3 deletions

diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index cdf5740ab03e..c9aa5bede226 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -1502,9 +1502,6 @@ static const struct sched_class rt_sched_class = {
         .enqueue_task           = enqueue_task_rt,
         .dequeue_task           = dequeue_task_rt,
         .yield_task             = yield_task_rt,
-#ifdef CONFIG_SMP
-        .select_task_rq         = select_task_rq_rt,
-#endif /* CONFIG_SMP */
 
         .check_preempt_curr     = check_preempt_curr_rt,
 
@@ -1512,6 +1509,8 @@ static const struct sched_class rt_sched_class = {
         .put_prev_task          = put_prev_task_rt,
 
 #ifdef CONFIG_SMP
+        .select_task_rq         = select_task_rq_rt,
+
         .load_balance           = load_balance_rt,
         .move_one_task          = move_one_task_rt,
         .set_cpus_allowed       = set_cpus_allowed_rt,