add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/opp/cpu.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Generic OPP helper interface for CPU device
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  *
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@@ -5,10 +6,6 @@
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  *	Nishanth Menon
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  *	Romit Dasgupta
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  *	Kevin Hilman
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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  */
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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@@ -108,7 +105,8 @@
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 EXPORT_SYMBOL_GPL(dev_pm_opp_free_cpufreq_table);
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 #endif	/* CONFIG_CPU_FREQ */
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-void _dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, bool of)
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+void _dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask,
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+				      int last_cpu)
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 {
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 	struct device *cpu_dev;
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 	int cpu;
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@@ -116,6 +114,9 @@
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 	WARN_ON(cpumask_empty(cpumask));
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 	for_each_cpu(cpu, cpumask) {
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+		if (cpu == last_cpu)
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+			break;
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+
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 		cpu_dev = get_cpu_device(cpu);
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 		if (!cpu_dev) {
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 			pr_err("%s: failed to get cpu%d device\n", __func__,
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@@ -123,10 +124,7 @@
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 			continue;
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 		}
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-		if (of)
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-			dev_pm_opp_of_remove_table(cpu_dev);
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-		else
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-			dev_pm_opp_remove_table(cpu_dev);
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+		dev_pm_opp_remove_table(cpu_dev);
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 	}
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 }
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@@ -140,7 +138,7 @@
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  */
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 void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask)
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 {
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-	_dev_pm_opp_cpumask_remove_table(cpumask, false);
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+	_dev_pm_opp_cpumask_remove_table(cpumask, -1);
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 }
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 EXPORT_SYMBOL_GPL(dev_pm_opp_cpumask_remove_table);
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@@ -222,8 +220,10 @@
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 	cpumask_clear(cpumask);
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 	if (opp_table->shared_opp == OPP_TABLE_ACCESS_SHARED) {
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+		mutex_lock(&opp_table->lock);
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 		list_for_each_entry(opp_dev, &opp_table->dev_list, node)
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 			cpumask_set_cpu(opp_dev->dev->id, cpumask);
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+		mutex_unlock(&opp_table->lock);
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 	} else {
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 		cpumask_set_cpu(cpu_dev->id, cpumask);
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 	}