Commit c88a1f8b authored by Lukasz Majewski's avatar Lukasz Majewski Committed by Rafael J. Wysocki
Browse files

cpufreq: Store cpufreq policies in a list 



Policies available in the cpufreq framework are now linked together.
They are accessible via cpufreq_policy_list defined in the cpufreq
core.

[rjw: Fix from Yinghai Lu folded in]
Signed-off-by: default avatarLukasz Majewski <l.majewski@samsung.com>
Signed-off-by: default avatarMyungjoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent d5b73cd8

drivers/cpufreq/cpufreq.c

+12 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data); 
static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data_fallback);

static DEFINE_RWLOCK(cpufreq_driver_lock);

static DEFINE_MUTEX(cpufreq_governor_lock);

static LIST_HEAD(cpufreq_policy_list);



#ifdef CONFIG_HOTPLUG_CPU

/* This one keeps track of the previously set governor of a removed CPU */
@@ -952,6 +953,7 @@ static struct cpufreq_policy *cpufreq_policy_alloc(void) 
	if (!zalloc_cpumask_var(&policy->related_cpus, GFP_KERNEL))

		goto err_free_cpumask;



	INIT_LIST_HEAD(&policy->policy_list);

	return policy;



err_free_cpumask:
@@ -964,6 +966,12 @@ err_free_policy: 


static void cpufreq_policy_free(struct cpufreq_policy *policy)

{

	unsigned long flags;



	write_lock_irqsave(&cpufreq_driver_lock, flags);

	list_del(&policy->policy_list);

	write_unlock_irqrestore(&cpufreq_driver_lock, flags);



	free_cpumask_var(policy->related_cpus);

	free_cpumask_var(policy->cpus);

	kfree(policy);
@@ -1077,6 +1085,10 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif, 
		ret = cpufreq_add_dev_interface(policy, dev);

		if (ret)

			goto err_out_unregister;



		write_lock_irqsave(&cpufreq_driver_lock, flags);

		list_add(&policy->policy_list, &cpufreq_policy_list);

		write_unlock_irqrestore(&cpufreq_driver_lock, flags);

	}



	cpufreq_init_policy(policy);

include/linux/cpufreq.h

+1 −0
Original line number Diff line number Diff line
@@ -82,6 +82,7 @@ struct cpufreq_policy { 


	struct cpufreq_real_policy	user_policy;



	struct list_head        policy_list;

	struct kobject		kobj;

	struct completion	kobj_unregister;

	int			transition_ongoing; /* Tracks transition status */

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