[tip: sched/core] sched: Hide unused sched_update_scaling()

["tip-bot2 for Arnd Bergmann" <tip-bot2@linutronix.de>]

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     d55ebae3f3122b07689cc4c34043114e09ce904c
Gitweb:        https://git.kernel.org/tip/d55ebae3f3122b07689cc4c34043114e09ce904c
Author:        Arnd Bergmann <arnd@arndb.de>
AuthorDate:    Mon, 22 May 2023 21:50:17 +02:00
Committer:     Peter Zijlstra <peterz@infradead.org>
CommitterDate: Tue, 30 May 2023 22:46:24 +02:00

sched: Hide unused sched_update_scaling()

This function is only used when CONFIG_SMP is enabled, without that there
is no caller and no prototype:

kernel/sched/fair.c:688:5: error: no previous prototype for 'sched_update_scaling' [-Werror=missing-prototypes

Hide the definition in the same #ifdef check as the declaration.

Fixes: 8a99b6833c88 ("sched: Move SCHED_DEBUG sysctl to debugfs")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org>
Link: https://lore.kernel.org/r/20230522195021.3456768-2-arnd@kernel.org
---
 kernel/sched/fair.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 48b6f0c..2c1b345 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -684,7 +684,7 @@ struct sched_entity *__pick_last_entity(struct cfs_rq *cfs_rq)
 /**************************************************************
  * Scheduling class statistics methods:
  */
-
+#ifdef CONFIG_SMP
 int sched_update_scaling(void)
 {
 	unsigned int factor = get_update_sysctl_factor();
@@ -702,6 +702,7 @@ int sched_update_scaling(void)
 	return 0;
 }
 #endif
+#endif
 
 /*
  * delta /= w