linux-kernel - [PATCH 1/3] sched_ext: Minor cleanups in kernel/sched/ext.h

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Date: Sat, 22 Jun 2024 15:50:20 -1000
From: Tejun Heo <tj@...nel.org>
To: torvalds@...ux-foundation.org
Cc: void@...ifault.com,
	mingo@...hat.com,
	peterz@...radead.org,
	tglx@...utronix.de,
	linux-kernel@...r.kernel.org,
	kernel-team@...a.com,
	Tejun Heo <tj@...nel.org>
Subject: [PATCH 1/3] sched_ext: Minor cleanups in kernel/sched/ext.h

- scx_ops_cpu_preempt is only used in kernel/sched/ext.c and doesn't need to
  be global. Make it static.

- Relocate task_on_scx() so that the inline functions are located together.

Signed-off-by: Tejun Heo <tj@...nel.org>
Cc: David Vernet <void@...ifault.com>
---
 kernel/sched/ext.c |  2 +-
 kernel/sched/ext.h | 12 +++++-------
 2 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c
index 28f7a4266fde..d4c645f9e031 100644
--- a/kernel/sched/ext.c
+++ b/kernel/sched/ext.c
@@ -771,7 +771,7 @@ static bool scx_warned_zero_slice;
 
 static DEFINE_STATIC_KEY_FALSE(scx_ops_enq_last);
 static DEFINE_STATIC_KEY_FALSE(scx_ops_enq_exiting);
-DEFINE_STATIC_KEY_FALSE(scx_ops_cpu_preempt);
+static DEFINE_STATIC_KEY_FALSE(scx_ops_cpu_preempt);
 static DEFINE_STATIC_KEY_FALSE(scx_builtin_idle_enabled);
 
 struct static_key_false scx_has_op[SCX_OPI_END] =
diff --git a/kernel/sched/ext.h b/kernel/sched/ext.h
index 0a7b9a34b18f..229007693504 100644
--- a/kernel/sched/ext.h
+++ b/kernel/sched/ext.h
@@ -26,13 +26,6 @@ DECLARE_STATIC_KEY_FALSE(__scx_switched_all);
 #define scx_enabled()		static_branch_unlikely(&__scx_ops_enabled)
 #define scx_switched_all()	static_branch_unlikely(&__scx_switched_all)
 
-DECLARE_STATIC_KEY_FALSE(scx_ops_cpu_preempt);
-
-static inline bool task_on_scx(const struct task_struct *p)
-{
-	return scx_enabled() && p->sched_class == &ext_sched_class;
-}
-
 void scx_tick(struct rq *rq);
 void init_scx_entity(struct sched_ext_entity *scx);
 void scx_pre_fork(struct task_struct *p);
@@ -54,6 +47,11 @@ static inline u32 scx_cpuperf_target(s32 cpu)
 		return 0;
 }
 
+static inline bool task_on_scx(const struct task_struct *p)
+{
+	return scx_enabled() && p->sched_class == &ext_sched_class;
+}
+
 static inline const struct sched_class *next_active_class(const struct sched_class *class)
 {
 	class++;
-- 
2.45.2