[PATCH v4 1/7] cpufreq: Store cpufreq policies in a list

Lukasz Majewski
2013-06-19T17:15:22Z

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

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>

Changes for v4:
- New patch
---
drivers/cpufreq/cpufreq.c | 3 +++
include/linux/cpufreq.h | 1 +
2 files changed, 4 insertions(+)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 2ce86ed..665e641 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -46,6 +46,7 @@ static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data);
static DEFINE_PER_CPU(char[CPUFREQ_NAME_LEN], cpufreq_cpu_governor);
#endif
static DEFINE_RWLOCK(cpufreq_driver_lock);
+static LIST_HEAD(cpufreq_policy_list);

/*
* cpu_policy_rwsem is a per CPU reader-writer semaphore designed to cure
@@ -989,6 +990,7 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
}
#endif

+ list_add(&policy->policy_list, &cpufreq_policy_list);
ret = cpufreq_add_dev_interface(cpu, policy, dev);
if (ret)
goto err_out_unregister;
@@ -1992,6 +1994,7 @@ int cpufreq_unregister_driver(struct cpufreq_driver *driver)
subsys_interface_unregister(&cpufreq_interface);
unregister_hotcpu_notifier(&cpufreq_cpu_notifier);

+ list_del(&cpufreq_policy_list);
write_lock_irqsave(&cpufreq_driver_lock, flags);
cpufreq_driver = NULL;
write_unlock_irqrestore(&cpufreq_driver_lock, flags);
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index ab1932c..5348981 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -117,6 +117,7 @@ struct cpufreq_policy {

struct cpufreq_real_policy user_policy;

+ struct list_head policy_list;
struct kobject kobj;
struct completion kobj_unregister;
};
--
1.7.10.4