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    Subject[PATCH v5 1/7] cpufreq: Store cpufreq policies in a list
    Date
    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 v5:
    - Call list_add() only when device successfully added
    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 0937b8d..420ccb5 100644
    --- a/drivers/cpufreq/cpufreq.c
    +++ b/drivers/cpufreq/cpufreq.c
    @@ -46,6 +46,7 @@ static struct cpufreq_driver *cpufreq_driver;
    static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data);
    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 */
    @@ -1054,6 +1055,7 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
    if (ret)
    goto err_out_unregister;

    + list_add(&policy->policy_list, &cpufreq_policy_list);
    kobject_uevent(&policy->kobj, KOBJ_ADD);
    module_put(cpufreq_driver->owner);
    pr_debug("initialization complete\n");
    @@ -2056,6 +2058,7 @@ 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 90d5a15..d8e30fc 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;
    int transition_ongoing; /* Tracks transition status */
    --
    1.7.10.4


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