linux-kernel - [PATCH] cpufreq: Use clamp helper macro to improve the code readability

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Message-ID: <20230816015853.849426-1-liaochang1@huawei.com>
Date:   Wed, 16 Aug 2023 01:58:53 +0000
From:   Liao Chang <liaochang1@...wei.com>
To:     <rafael@...nel.org>, <viresh.kumar@...aro.org>
CC:     <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] cpufreq: Use clamp helper macro to improve the code readability

The valid values of policy.{min, max} should be between 'min' and 'max',
so use clamp() helper macro to makes cpufreq_verify_within_limits() more
readable.

Signed-off-by: Liao Chang <liaochang1@...wei.com>
---
 include/linux/cpufreq.h | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 99da27466b8f..43b363a99215 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -19,6 +19,7 @@
 #include <linux/pm_qos.h>
 #include <linux/spinlock.h>
 #include <linux/sysfs.h>
+#include <linux/minmax.h>
 
 /*********************************************************************
  *                        CPUFREQ INTERFACE                          *
@@ -467,17 +468,8 @@ static inline void cpufreq_verify_within_limits(struct cpufreq_policy_data *poli
 						unsigned int min,
 						unsigned int max)
 {
-	if (policy->min < min)
-		policy->min = min;
-	if (policy->max < min)
-		policy->max = min;
-	if (policy->min > max)
-		policy->min = max;
-	if (policy->max > max)
-		policy->max = max;
-	if (policy->min > policy->max)
-		policy->min = policy->max;
-	return;
+	policy->max = clamp(policy->max, min, max);
+	policy->min = clamp(policy->min, min, policy->max);
 }
 
 static inline void
-- 
2.34.1