linux-kernel - [PATCH 4/4] sched_ext: Clean up and standardize #if/#else/#endif markers in sched/ext

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Message-ID: <20250611135404.13851-5-yphbchou0911@gmail.com>
Date: Wed, 11 Jun 2025 21:54:04 +0800
From: Cheng-Yang Chou <yphbchou0911@...il.com>
To: linux-kernel@...r.kernel.org
Cc: tj@...nel.org,
	void@...ifault.com,
	arighi@...dia.com,
	changwoo@...lia.com,
	jserv@...s.ncku.edu.tw,
	yphbchou0911@...il.com
Subject: [PATCH 4/4] sched_ext: Clean up and standardize #if/#else/#endif markers in sched/ext_idle.h

Simplify the scheduler by making formerly SMP-only primitives and data
structures unconditional.

Signed-off-by: Cheng-Yang Chou <yphbchou0911@...il.com>
---
 kernel/sched/ext_idle.h | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/kernel/sched/ext_idle.h b/kernel/sched/ext_idle.h
index 37be78a7502b..906f1672c1d7 100644
--- a/kernel/sched/ext_idle.h
+++ b/kernel/sched/ext_idle.h
@@ -12,20 +12,10 @@
 
 struct sched_ext_ops;
 
-#ifdef CONFIG_SMP
 void scx_idle_update_selcpu_topology(struct sched_ext_ops *ops);
 void scx_idle_init_masks(void);
 bool scx_idle_test_and_clear_cpu(int cpu);
 s32 scx_pick_idle_cpu(const struct cpumask *cpus_allowed, int node, u64 flags);
-#else /* !CONFIG_SMP */
-static inline void scx_idle_update_selcpu_topology(struct sched_ext_ops *ops) {}
-static inline void scx_idle_init_masks(void) {}
-static inline bool scx_idle_test_and_clear_cpu(int cpu) { return false; }
-static inline s32 scx_pick_idle_cpu(const struct cpumask *cpus_allowed, int node, u64 flags)
-{
-	return -EBUSY;
-}
-#endif /* CONFIG_SMP */
 
 s32 scx_select_cpu_dfl(struct task_struct *p, s32 prev_cpu, u64 wake_flags,
 		       const struct cpumask *cpus_allowed, u64 flags);
-- 
2.43.0