linux-kernel - [PATCH v3 02/12] ACPI: processor: thermal: Use scope-based cleanup helper

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Message-Id: <20250901085748.36795-3-zhangzihuan@kylinos.cn>
Date: Mon,  1 Sep 2025 16:57:38 +0800
From: Zihuan Zhang <zhangzihuan@...inos.cn>
To: "Rafael J . wysocki" <rafael@...nel.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
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	Krzysztof Kozlowski <krzk@...nel.org>,
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	Thierry Reding <thierry.reding@...il.com>,
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Cc: Ben Horgan <ben.horgan@....com>,
	zhenglifeng <zhenglifeng1@...wei.com>,
	Zhang Rui <rui.zhang@...el.com>,
	Len Brown <lenb@...nel.org>,
	Lukasz Luba <lukasz.luba@....com>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Beata Michalska <beata.michalska@....com>,
	Fabio Estevam <festevam@...il.com>,
	Pavel Machek <pavel@...nel.org>,
	Sumit Gupta <sumitg@...dia.com>,
	Prasanna Kumar T S M <ptsm@...ux.microsoft.com>,
	Sudeep Holla <sudeep.holla@....com>,
	Yicong Yang <yangyicong@...ilicon.com>,
	linux-pm@...r.kernel.org,
	linux-acpi@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org,
	linux-arm-kernel@...ts.infradead.org,
	intel-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	imx@...ts.linux.dev,
	linux-omap@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Zihuan Zhang <zhangzihuan@...inos.cn>
Subject: [PATCH v3 02/12] ACPI: processor: thermal: Use scope-based cleanup helper

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 | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/drivers/acpi/processor_thermal.c b/drivers/acpi/processor_thermal.c
index 1219adb11ab9..3c8b57df9619 100644
--- a/drivers/acpi/processor_thermal.c
+++ b/drivers/acpi/processor_thermal.c
@@ -62,19 +62,14 @@ static int phys_package_first_cpu(int cpu)
 	return 0;
 }
 
-static int cpu_has_cpufreq(unsigned int cpu)
+static bool cpu_has_cpufreq(unsigned int cpu)
 {
-	struct cpufreq_policy *policy;
+	struct cpufreq_policy *policy __free(put_cpufreq_policy) = cpufreq_cpu_get(cpu);
 
 	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 +90,6 @@ 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 acpi_processor *pr;
 	unsigned long max_freq;
 	int i, ret;
@@ -111,6 +105,9 @@ static int cpufreq_set_cur_state(unsigned int cpu, int state)
 	 * frequency.
 	 */
 	for_each_online_cpu(i) {
+		struct cpufreq_policy *policy __free(put_cpufreq_policy) =
+			cpufreq_cpu_get(i);
+
 		if (topology_physical_package_id(i) !=
 		    topology_physical_package_id(cpu))
 			continue;
@@ -120,15 +117,12 @@ static int cpufreq_set_cur_state(unsigned int cpu, int state)
 		if (unlikely(!freq_qos_request_active(&pr->thermal_req)))
 			continue;
 
-		policy = cpufreq_cpu_get(i);
 		if (!policy)
 			return -EINVAL;
 
 		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