[PATCH sched_ext/for-7.4] sched_ext: Merge adjacent ifdefs in ext.h

[Cheng-Yang Chou <yphbchou0911@gmail.com>]

Commit 6a1cda143c23 ("sched_ext: Always use SMP versions in
kernel/sched/ext.h") dropped the CONFIG_SMP guard from scx_update_idle(),
leaving two adjacent CONFIG_SCHED_CLASS_EXT blocks.

Merge the declaration and stub into the primary ifdef block.
No functional change.

Signed-off-by: Cheng-Yang Chou <yphbchou0911@gmail.com>
---
 kernel/sched/ext/ext.h | 20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/kernel/sched/ext/ext.h b/kernel/sched/ext/ext.h
index 0b7fc46aee08c..0012f708a5504 100644
--- a/kernel/sched/ext/ext.h
+++ b/kernel/sched/ext/ext.h
@@ -21,6 +21,13 @@ int scx_check_setscheduler(struct task_struct *p, int policy);
 bool task_should_scx(int policy);
 bool scx_allow_ttwu_queue(const struct task_struct *p);
 void init_sched_ext_class(void);
+void __scx_update_idle(struct rq *rq, bool idle, bool do_notify);
+
+static inline void scx_update_idle(struct rq *rq, bool idle, bool do_notify)
+{
+	if (scx_enabled())
+		__scx_update_idle(rq, idle, do_notify);
+}
 
 static inline u32 scx_cpuperf_target(s32 cpu)
 {
@@ -55,21 +62,10 @@ static inline int scx_check_setscheduler(struct task_struct *p, int policy) { re
 static inline bool task_on_scx(const struct task_struct *p) { return false; }
 static inline bool scx_allow_ttwu_queue(const struct task_struct *p) { return true; }
 static inline void init_sched_ext_class(void) {}
+static inline void scx_update_idle(struct rq *rq, bool idle, bool do_notify) {}
 
 #endif	/* CONFIG_SCHED_CLASS_EXT */
 
-#ifdef CONFIG_SCHED_CLASS_EXT
-void __scx_update_idle(struct rq *rq, bool idle, bool do_notify);
-
-static inline void scx_update_idle(struct rq *rq, bool idle, bool do_notify)
-{
-	if (scx_enabled())
-		__scx_update_idle(rq, idle, do_notify);
-}
-#else
-static inline void scx_update_idle(struct rq *rq, bool idle, bool do_notify) {}
-#endif
-
 #ifdef CONFIG_CGROUP_SCHED
 #ifdef CONFIG_EXT_GROUP_SCHED
 void scx_tg_init(struct task_group *tg);
-- 
2.43.0