linux-kernel - [PATCH v2 1/2] sched: Expose idle

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Message-ID: <20250619000925.415528-2-pmalani@google.com>
Date: Thu, 19 Jun 2025 00:09:16 +0000
From: Prashant Malani <pmalani@...gle.com>
To: Ben Segall <bsegall@...gle.com>, Dietmar Eggemann <dietmar.eggemann@....com>, 
	Ingo Molnar <mingo@...hat.com>, Juri Lelli <juri.lelli@...hat.com>, 
	open list <linux-kernel@...r.kernel.org>, 
	"open list:CPU FREQUENCY SCALING FRAMEWORK" <linux-pm@...r.kernel.org>, Mel Gorman <mgorman@...e.de>, 
	Peter Zijlstra <peterz@...radead.org>, "Rafael J. Wysocki" <rafael@...nel.org>, 
	Steven Rostedt <rostedt@...dmis.org>, Valentin Schneider <vschneid@...hat.com>, 
	Vincent Guittot <vincent.guittot@...aro.org>, Viresh Kumar <viresh.kumar@...aro.org>
Cc: Prashant Malani <pmalani@...gle.com>
Subject: [PATCH v2 1/2] sched: Expose idle_cpu() to modules

idle_cpu() can be helpful in some drivers which can utilize it to make
performance optimizations based on CPU idle state; since these drivers
can be compiled as modules, that prevents them from using idle_cpu().

So, expose the function to be available to modules.

Signed-off-by: Prashant Malani <pmalani@...gle.com>
---

Patch first introduced in v2.

 kernel/sched/syscalls.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/sched/syscalls.c b/kernel/sched/syscalls.c
index 547c1f05b667..0fd5e2dafcf7 100644
--- a/kernel/sched/syscalls.c
+++ b/kernel/sched/syscalls.c
@@ -216,6 +216,7 @@ int idle_cpu(int cpu)
 
 	return 1;
 }
+EXPORT_SYMBOL_GPL(idle_cpu);
 
 /**
  * available_idle_cpu - is a given CPU idle for enqueuing work.
-- 
2.50.0.rc2.701.gf1e915cc24-goog