linux-kernel - [PATCH v2 03/18] ACPI: processor: thermal: Use __free(put_cpufreq

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Message-Id: <20250827023202.10310-4-zhangzihuan@kylinos.cn>
Date: Wed, 27 Aug 2025 10:31:47 +0800
From: Zihuan Zhang <zhangzihuan@...inos.cn>
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	Zihuan Zhang <zhangzihuan@...inos.cn>
Subject: [PATCH v2 03/18] ACPI: processor: thermal: Use __free(put_cpufreq_policy) for policy reference

Replace the manual cpufreq_cpu_put() with __free(put_cpufreq_policy)
annotation for policy references. This reduces the risk of reference
counting mistakes and aligns the code with the latest kernel style.

No functional change intended.

Signed-off-by: Zihuan Zhang <zhangzihuan@...inos.cn>
---
 drivers/acpi/processor_thermal.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/acpi/processor_thermal.c b/drivers/acpi/processor_thermal.c
index 1219adb11ab9..f99ed0812934 100644
--- a/drivers/acpi/processor_thermal.c
+++ b/drivers/acpi/processor_thermal.c
@@ -64,17 +64,13 @@ static int phys_package_first_cpu(int cpu)
 
 static int cpu_has_cpufreq(unsigned int cpu)
 {
-	struct cpufreq_policy *policy;
+	struct cpufreq_policy *policy __free(put_cpufreq_policy);
 
 	if (!acpi_processor_cpufreq_init)
 		return 0;
 
 	policy = cpufreq_cpu_get(cpu);
-	if (policy) {
-		cpufreq_cpu_put(policy);
-		return 1;
-	}
-	return 0;
+	return !!policy;
 }
 
 static int cpufreq_get_max_state(unsigned int cpu)
@@ -95,7 +91,7 @@ static int cpufreq_get_cur_state(unsigned int cpu)
 
 static int cpufreq_set_cur_state(unsigned int cpu, int state)
 {
-	struct cpufreq_policy *policy;
+	struct cpufreq_policy *policy __free(put_cpufreq_policy);
 	struct acpi_processor *pr;
 	unsigned long max_freq;
 	int i, ret;
@@ -127,8 +123,6 @@ static int cpufreq_set_cur_state(unsigned int cpu, int state)
 		max_freq = (policy->cpuinfo.max_freq *
 			    (100 - reduction_step(i) * cpufreq_thermal_reduction_pctg)) / 100;
 
-		cpufreq_cpu_put(policy);
-
 		ret = freq_qos_update_request(&pr->thermal_req, max_freq);
 		if (ret < 0) {
 			pr_warn("Failed to update thermal freq constraint: CPU%d (%d)\n",
-- 
2.25.1