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Commit 1b274294 authored by Viresh Kumar's avatar Viresh Kumar Committed by Rafael J. Wysocki
Browse files

cpufreq: Use cpufreq_policy_list for iterating over policies 



To iterate over all policies we currently iterate over all online
CPUs and then get the policy for each of them which is suboptimal.
Use the newly created cpufreq_policy_list for this purpose instead.

Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 474deff7

drivers/cpufreq/cpufreq.c

+4 −5
Original line number Diff line number Diff line
@@ -961,8 +961,8 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif, 
	struct cpufreq_policy *policy;

	unsigned long flags;

#ifdef CONFIG_HOTPLUG_CPU

	struct cpufreq_policy *tpolicy;

	struct cpufreq_governor *gov;

	int sibling;

#endif



	if (cpu_is_offline(cpu))
@@ -985,11 +985,10 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif, 
#ifdef CONFIG_HOTPLUG_CPU

	/* Check if this cpu was hot-unplugged earlier and has siblings */

	read_lock_irqsave(&cpufreq_driver_lock, flags);

	for_each_online_cpu(sibling) {

		struct cpufreq_policy *cp = per_cpu(cpufreq_cpu_data, sibling);

		if (cp && cpumask_test_cpu(cpu, cp->related_cpus)) {

	list_for_each_entry(tpolicy, &cpufreq_policy_list, policy_list) {

		if (cpumask_test_cpu(cpu, tpolicy->related_cpus)) {

			read_unlock_irqrestore(&cpufreq_driver_lock, flags);

			ret = cpufreq_add_policy_cpu(cp, cpu, dev, frozen);

			ret = cpufreq_add_policy_cpu(tpolicy, cpu, dev, frozen);

			up_read(&cpufreq_rwsem);

			return ret;

		}