linux-kernel - [PATCH v6 2/3] sched: Make raw_spin_rq

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Message-ID: <20260124171546.43398-3-qq570070308@gmail.com>
Date: Sun, 25 Jan 2026 01:15:45 +0800
From: Xie Yuanbin <qq570070308@...il.com>
To: peterz@...radead.org,
	tglx@...nel.org,
	riel@...riel.com,
	segher@...nel.crashing.org,
	david@...nel.org,
	hpa@...or.com,
	arnd@...db.de,
	mingo@...hat.com,
	juri.lelli@...hat.com,
	vincent.guittot@...aro.org,
	dietmar.eggemann@....com,
	rostedt@...dmis.org,
	bsegall@...gle.com,
	mgorman@...e.de,
	vschneid@...hat.com,
	bp@...en8.de,
	dave.hansen@...ux.intel.com,
	luto@...nel.org,
	houwenlong.hwl@...group.com
Cc: linux-kernel@...r.kernel.org,
	x86@...nel.org,
	Xie Yuanbin <qq570070308@...il.com>
Subject: [PATCH v6 2/3] sched: Make raw_spin_rq_unlock() inline

raw_spin_rq_unlock() is short, and is called in some hot code paths
such as finish_lock_switch.

Make raw_spin_rq_unlock() inline to optimize performance.

Signed-off-by: Xie Yuanbin <qq570070308@...il.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...nel.org>
Cc: Rik van Riel <riel@...riel.com>
Cc: Segher Boessenkool <segher@...nel.crashing.org>
Cc: David Hildenbrand (Red Hat) <david@...nel.org>
Cc: H. Peter Anvin (Intel) <hpa@...or.com>
---
 kernel/sched/core.c  | 5 -----
 kernel/sched/sched.h | 9 ++++++---
 2 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 7de5ceb9878b..12d3c42960f2 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -687,11 +687,6 @@ bool raw_spin_rq_trylock(struct rq *rq)
 	}
 }
 
-void raw_spin_rq_unlock(struct rq *rq)
-{
-	raw_spin_unlock(rq_lockp(rq));
-}
-
 /*
  * double_rq_lock - safely lock two runqueues
  */
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index b0d920aa0acb..2daa63b760dd 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -1604,15 +1604,18 @@ extern void raw_spin_rq_lock_nested(struct rq *rq, int subclass)
 extern bool raw_spin_rq_trylock(struct rq *rq)
 	__cond_acquires(true, __rq_lockp(rq));
 
-extern void raw_spin_rq_unlock(struct rq *rq)
-	__releases(__rq_lockp(rq));
-
 static inline void raw_spin_rq_lock(struct rq *rq)
 	__acquires(__rq_lockp(rq))
 {
 	raw_spin_rq_lock_nested(rq, 0);
 }
 
+static inline void raw_spin_rq_unlock(struct rq *rq)
+	__releases(__rq_lockp(rq))
+{
+	raw_spin_unlock(rq_lockp(rq));
+}
+
 static inline void raw_spin_rq_lock_irq(struct rq *rq)
 	__acquires(__rq_lockp(rq))
 {
-- 
2.51.0