linux-kernel - [PATCH 2/3] cpuidle: Don't pass any values to cpuidle_not

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230316074750.289025-2-kazukih0205@gmail.com>
Date:   Thu, 16 Mar 2023 16:47:49 +0900
From:   Kazuki H <kazukih0205@...il.com>
To:     linux-pm@...r.kernel.org
Cc:     Hector Martin <marcan@...can.st>, Sven Peter <sven@...npeter.dev>,
        Kazuki H <kazukih0205@...il.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Valentin Schneider <vschneid@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] cpuidle: Don't pass any values to cpuidle_not_available

There's no reason to pass any values to cpuidle_not_available() as the
function works standalone. Since we're planning to use the function in
other places, make it so to avoid code duplication.

Signed-off-by: Kazuki H <kazukih0205@...il.com>
---
 drivers/cpuidle/cpuidle.c | 6 ++++--
 include/linux/cpuidle.h   | 6 ++----
 kernel/sched/idle.c       | 2 +-
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 6eceb1988243..cc05acf4d2a8 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -48,9 +48,11 @@ void disable_cpuidle(void)
 	off = 1;
 }
 
-bool cpuidle_not_available(struct cpuidle_driver *drv,
-			   struct cpuidle_device *dev)
+bool cpuidle_not_available(void)
 {
+	struct cpuidle_device *dev = cpuidle_get_device();
+	struct cpuidle_driver *drv = cpuidle_get_cpu_driver(dev);
+
 	return off || !initialized || !drv || !dev || !dev->enabled;
 }
 
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index fce476275e16..11de17924910 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -139,8 +139,7 @@ struct cpuidle_driver {
 
 #ifdef CONFIG_CPU_IDLE
 extern void disable_cpuidle(void);
-extern bool cpuidle_not_available(struct cpuidle_driver *drv,
-				  struct cpuidle_device *dev);
+extern bool cpuidle_not_available(void);
 
 extern int cpuidle_select(struct cpuidle_driver *drv,
 			  struct cpuidle_device *dev,
@@ -174,8 +173,7 @@ static inline struct cpuidle_device *cpuidle_get_device(void)
 {return __this_cpu_read(cpuidle_devices); }
 #else
 static inline void disable_cpuidle(void) { }
-static inline bool cpuidle_not_available(struct cpuidle_driver *drv,
-					 struct cpuidle_device *dev)
+static inline bool cpuidle_not_available(void)
 {return true; }
 static inline int cpuidle_select(struct cpuidle_driver *drv,
 				 struct cpuidle_device *dev, bool *stop_tick)
diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index dbfc2eb5ccbd..558a5c987597 100644
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -179,7 +179,7 @@ static void cpuidle_idle_call(void)
 		return;
 	}
 
-	if (cpuidle_not_available(drv, dev)) {
+	if (cpuidle_not_available()) {
 		tick_nohz_idle_stop_tick();
 
 		default_idle_call();
-- 
2.40.0