thermal: cpu_cooling: use cpufreq_dev_list instead of cpufreq_dev_count

As we already have a list of cpufreq_cooling_devices now, lets use it instead of
a local counter.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
index d2e6f845fe7de577cb566063c90208896fa7a9b2..32ff6dc5efee848fe07dea9100d50affda40704a 100644 (file)
--- a/drivers/thermal/cpu_cooling.c
+++ b/drivers/thermal/cpu_cooling.c
@@ -71,8 +71,6 @@ struct cpufreq_cooling_device {
 static DEFINE_IDR(cpufreq_idr);
 static DEFINE_MUTEX(cooling_cpufreq_lock);
 
-static unsigned int cpufreq_dev_count;
-
 static LIST_HEAD(cpufreq_dev_list);
 
 /**
@@ -419,10 +417,9 @@ __cpufreq_cooling_register(struct device_node *np,
        mutex_lock(&cooling_cpufreq_lock);
 
        /* Register the notifier for first cpufreq cooling device */
-       if (cpufreq_dev_count == 0)
+       if (list_empty(&cpufreq_dev_list))
                cpufreq_register_notifier(&thermal_cpufreq_notifier_block,
                                          CPUFREQ_POLICY_NOTIFIER);
-       cpufreq_dev_count++;
        list_add(&cpufreq_dev->node, &cpufreq_dev_list);
 
        mutex_unlock(&cooling_cpufreq_lock);
@@ -495,10 +492,9 @@ void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
        cpufreq_dev = cdev->devdata;
        mutex_lock(&cooling_cpufreq_lock);
        list_del(&cpufreq_dev->node);
-       cpufreq_dev_count--;
 
        /* Unregister the notifier for the last cpufreq cooling device */
-       if (cpufreq_dev_count == 0)
+       if (list_empty(&cpufreq_dev_list))
                cpufreq_unregister_notifier(&thermal_cpufreq_notifier_block,
                                            CPUFREQ_POLICY_NOTIFIER);
        mutex_unlock(&cooling_cpufreq_lock);