linux-kernel - [PATCH 1/3] cpufreq: CPPC: Remove cpu_data

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: <20250526113057.3086513-2-zhenglifeng1@huawei.com>
Date: Mon, 26 May 2025 19:30:55 +0800
From: Lifeng Zheng <zhenglifeng1@...wei.com>
To: <rafael@...nel.org>, <viresh.kumar@...aro.org>, <robert.moore@...el.com>,
	<lenb@...nel.org>
CC: <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-acpi@...r.kernel.org>, <acpica-devel@...ts.linux.dev>,
	<linuxarm@...wei.com>, <jonathan.cameron@...wei.com>,
	<zhanjie9@...ilicon.com>, <lihuisong@...wei.com>,
	<cenxinghai@...artners.com>, <yubowen8@...wei.com>, <zhenglifeng1@...wei.com>
Subject: [PATCH 1/3] cpufreq: CPPC: Remove cpu_data_list

After commit a28b2bfc099c ("cppc_cpufreq: replace per-cpu data array with a
list"), cpu_data can be got from policy->driver_data, so cpu_data_list is
not actually needed and can be removed.

Signed-off-by: Lifeng Zheng <zhenglifeng1@...wei.com>
---
 drivers/cpufreq/cppc_cpufreq.c | 25 -------------------------
 include/acpi/cppc_acpi.h       |  1 -
 2 files changed, 26 deletions(-)

diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
index b7c688a5659c..f3b5ea9fcbf5 100644
--- a/drivers/cpufreq/cppc_cpufreq.c
+++ b/drivers/cpufreq/cppc_cpufreq.c
@@ -26,14 +26,6 @@
 
 #include <acpi/cppc_acpi.h>
 
-/*
- * This list contains information parsed from per CPU ACPI _CPC and _PSD
- * structures: e.g. the highest and lowest supported performance, capabilities,
- * desired performance, level requested etc. Depending on the share_type, not
- * all CPUs will have an entry in the list.
- */
-static LIST_HEAD(cpu_data_list);
-
 static struct cpufreq_driver cppc_cpufreq_driver;
 
 #ifdef CONFIG_ACPI_CPPC_CPUFREQ_FIE
@@ -567,8 +559,6 @@ static struct cppc_cpudata *cppc_cpufreq_get_cpu_data(unsigned int cpu)
 		goto free_mask;
 	}
 
-	list_add(&cpu_data->node, &cpu_data_list);
-
 	return cpu_data;
 
 free_mask:
@@ -583,7 +573,6 @@ static void cppc_cpufreq_put_cpu_data(struct cpufreq_policy *policy)
 {
 	struct cppc_cpudata *cpu_data = policy->driver_data;
 
-	list_del(&cpu_data->node);
 	free_cpumask_var(cpu_data->shared_cpu_map);
 	kfree(cpu_data);
 	policy->driver_data = NULL;
@@ -954,24 +943,10 @@ static int __init cppc_cpufreq_init(void)
 	return ret;
 }
 
-static inline void free_cpu_data(void)
-{
-	struct cppc_cpudata *iter, *tmp;
-
-	list_for_each_entry_safe(iter, tmp, &cpu_data_list, node) {
-		free_cpumask_var(iter->shared_cpu_map);
-		list_del(&iter->node);
-		kfree(iter);
-	}
-
-}
-
 static void __exit cppc_cpufreq_exit(void)
 {
 	cpufreq_unregister_driver(&cppc_cpufreq_driver);
 	cppc_freq_invariance_exit();
-
-	free_cpu_data();
 }
 
 module_exit(cppc_cpufreq_exit);
diff --git a/include/acpi/cppc_acpi.h b/include/acpi/cppc_acpi.h
index 325e9543e08f..20f3d62e7a16 100644
--- a/include/acpi/cppc_acpi.h
+++ b/include/acpi/cppc_acpi.h
@@ -139,7 +139,6 @@ struct cppc_perf_fb_ctrs {
 
 /* Per CPU container for runtime CPPC management. */
 struct cppc_cpudata {
-	struct list_head node;
 	struct cppc_perf_caps perf_caps;
 	struct cppc_perf_ctrls perf_ctrls;
 	struct cppc_perf_fb_ctrs perf_fb_ctrs;
-- 
2.33.0