linux-kernel - [PATCH 31/43] sched/smp: Use the SMP version of schedstats

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Message-ID: <20250528080924.2273858-32-mingo@kernel.org>
Date: Wed, 28 May 2025 10:09:12 +0200
From: Ingo Molnar <mingo@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: Dietmar Eggemann <dietmar.eggemann@....com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Shrikanth Hegde <sshegde@...ux.ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Valentin Schneider <vschneid@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Mel Gorman <mgorman@...e.de>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Ingo Molnar <mingo@...nel.org>,
	Juri Lelli <juri.lelli@...hat.com>
Subject: [PATCH 31/43] sched/smp: Use the SMP version of schedstats

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

Signed-off-by: Ingo Molnar <mingo@...nel.org>
Cc: Dietmar Eggemann <dietmar.eggemann@....com>
Cc: Juri Lelli <juri.lelli@...hat.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Mel Gorman <mgorman@...e.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Shrikanth Hegde <sshegde@...ux.ibm.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Valentin Schneider <vschneid@...hat.com>
Cc: Vincent Guittot <vincent.guittot@...aro.org>
---
 kernel/sched/stats.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/kernel/sched/stats.c b/kernel/sched/stats.c
index def01886e93f..adb40371e370 100644
--- a/kernel/sched/stats.c
+++ b/kernel/sched/stats.c
@@ -114,10 +114,8 @@ static int show_schedstat(struct seq_file *seq, void *v)
 		seq_printf(seq, "timestamp %lu\n", jiffies);
 	} else {
 		struct rq *rq;
-#ifdef CONFIG_SMP
 		struct sched_domain *sd;
 		int dcount = 0;
-#endif
 		cpu = (unsigned long)(v - 2);
 		rq = cpu_rq(cpu);
 
@@ -132,7 +130,6 @@ static int show_schedstat(struct seq_file *seq, void *v)
 
 		seq_printf(seq, "\n");
 
-#ifdef CONFIG_SMP
 		/* domain-specific stats */
 		rcu_read_lock();
 		for_each_domain(cpu, sd) {
@@ -163,7 +160,6 @@ static int show_schedstat(struct seq_file *seq, void *v)
 			    sd->ttwu_move_balance);
 		}
 		rcu_read_unlock();
-#endif /* CONFIG_SMP */
 	}
 	return 0;
 }
-- 
2.45.2