linux-kernel - [PATCH 1/3] sched: Relocate sched_smt

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Message-ID: <20251021145706.61534-2-arighi@nvidia.com>
Date: Tue, 21 Oct 2025 16:55:42 +0200
From: Andrea Righi <arighi@...dia.com>
To: Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Juri Lelli <juri.lelli@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>
Cc: Dietmar Eggemann <dietmar.eggemann@....com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ben Segall <bsegall@...gle.com>,
	Mel Gorman <mgorman@...e.de>,
	Valentin Schneider <vschneid@...hat.com>,
	Tejun Heo <tj@...nel.org>,
	David Vernet <void@...ifault.com>,
	Changwoo Min <changwoo@...lia.com>,
	Joel Fernandes <joelagnelf@...dia.com>,
	sched-ext@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] sched: Relocate sched_smt_present definition to core.c

Multiple sched classes are using sched_smt_present, so move it from
fair.c to core.c, next to the helpers that update its state.

No functional changes.

Signed-off-by: Andrea Righi <arighi@...dia.com>
---
 kernel/sched/core.c | 5 +++++
 kernel/sched/fair.c | 3 ---
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index f1ebf67b48e21..87387f3e04dd0 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -8376,6 +8376,11 @@ static void cpuset_cpu_inactive(unsigned int cpu)
 	}
 }
 
+#ifdef CONFIG_SCHED_SMT
+DEFINE_STATIC_KEY_FALSE(sched_smt_present);
+EXPORT_SYMBOL_GPL(sched_smt_present);
+#endif
+
 static inline void sched_smt_present_inc(int cpu)
 {
 #ifdef CONFIG_SCHED_SMT
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index cee1793e8277a..ef0a1bd26450b 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -7539,9 +7539,6 @@ static inline int __select_idle_cpu(int cpu, struct task_struct *p)
 }
 
 #ifdef CONFIG_SCHED_SMT
-DEFINE_STATIC_KEY_FALSE(sched_smt_present);
-EXPORT_SYMBOL_GPL(sched_smt_present);
-
 static inline void set_idle_cores(int cpu, int val)
 {
 	struct sched_domain_shared *sds;
-- 
2.51.1