cpufreq: Rework two functions related to CPU offline

Since __cpufreq_remove_dev_prepare() and __cpufreq_remove_dev_finish()
are about CPU offline rather than about CPU removal, rename them to
cpufreq_offline_prepare() and cpufreq_offline_finish(), respectively.

Also change their argument from a struct device pointer to a CPU
number, because they use the CPU number only internally anyway
and make them void as their return values are ignored.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 46251e8d30f201ffb43f890a85011c1c9808be5f..29e3ec9792668160e81b9ed3449aa0e49f2aef1e 100644 (file)
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1398,10 +1398,8 @@ out_release_rwsem:
        return ret;
 }
 
-static int __cpufreq_remove_dev_prepare(struct device *dev)
+static void cpufreq_offline_prepare(unsigned int cpu)
 {
-       unsigned int cpu = dev->id;
-       int ret = 0;
        struct cpufreq_policy *policy;
 
        pr_debug("%s: unregistering CPU %u\n", __func__, cpu);
@@ -1409,11 +1407,11 @@ static int __cpufreq_remove_dev_prepare(struct device *dev)
        policy = cpufreq_cpu_get_raw(cpu);
        if (!policy) {
                pr_debug("%s: No cpu_data found\n", __func__);
-               return -EINVAL;
+               return;
        }
 
        if (has_target()) {
-               ret = __cpufreq_governor(policy, CPUFREQ_GOV_STOP);
+               int ret = __cpufreq_governor(policy, CPUFREQ_GOV_STOP);
                if (ret)
                        pr_err("%s: Failed to stop governor\n", __func__);
        }
@@ -1434,7 +1432,7 @@ static int __cpufreq_remove_dev_prepare(struct device *dev)
        /* Start governor again for active policy */
        if (!policy_is_inactive(policy)) {
                if (has_target()) {
-                       ret = __cpufreq_governor(policy, CPUFREQ_GOV_START);
+                       int ret = __cpufreq_governor(policy, CPUFREQ_GOV_START);
                        if (!ret)
                                ret = __cpufreq_governor(policy, CPUFREQ_GOV_LIMITS);
 
@@ -1444,28 +1442,24 @@ static int __cpufreq_remove_dev_prepare(struct device *dev)
        } else if (cpufreq_driver->stop_cpu) {
                cpufreq_driver->stop_cpu(policy);
        }
-
-       return ret;
 }
 
-static int __cpufreq_remove_dev_finish(struct device *dev)
+static void cpufreq_offline_finish(unsigned int cpu)
 {
-       unsigned int cpu = dev->id;
-       int ret;
        struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu);
 
        if (!policy) {
                pr_debug("%s: No cpu_data found\n", __func__);
-               return -EINVAL;
+               return;
        }
 
        /* Only proceed for inactive policies */
        if (!policy_is_inactive(policy))
-               return 0;
+               return;
 
        /* If cpu is last user of policy, free policy */
        if (has_target()) {
-               ret = __cpufreq_governor(policy, CPUFREQ_GOV_POLICY_EXIT);
+               int ret = __cpufreq_governor(policy, CPUFREQ_GOV_POLICY_EXIT);
                if (ret)
                        pr_err("%s: Failed to exit governor\n", __func__);
        }
@@ -1477,8 +1471,6 @@ static int __cpufreq_remove_dev_finish(struct device *dev)
         */
        if (cpufreq_driver->exit)
                cpufreq_driver->exit(policy);
-
-       return 0;
 }
 
 /**
@@ -1495,8 +1487,8 @@ static int cpufreq_remove_dev(struct device *dev, struct subsys_interface *sif)
                return 0;
 
        if (cpu_online(cpu)) {
-               __cpufreq_remove_dev_prepare(dev);
-               __cpufreq_remove_dev_finish(dev);
+               cpufreq_offline_prepare(cpu);
+               cpufreq_offline_finish(cpu);
        }
 
        cpumask_clear_cpu(cpu, policy->real_cpus);
@@ -2379,11 +2371,11 @@ static int cpufreq_cpu_callback(struct notifier_block *nfb,
                        break;
 
                case CPU_DOWN_PREPARE:
-                       __cpufreq_remove_dev_prepare(dev);
+                       cpufreq_offline_prepare(cpu);
                        break;
 
                case CPU_POST_DEAD:
-                       __cpufreq_remove_dev_finish(dev);
+                       cpufreq_offline_finish(cpu);
                        break;
 
                case CPU_DOWN_FAILED: