Merge branch 'pm-cpufreq'
[muen/linux.git] / drivers / base / arch_topology.c
index 6df7d6676a48104267b5e739c6e58b85a00724e1..0739c5b953bf8ab1b1f48d8df9a14cc9fcb76731 100644 (file)
 #include <linux/string.h>
 #include <linux/sched/topology.h>
 
-static DEFINE_MUTEX(cpu_scale_mutex);
-static DEFINE_PER_CPU(unsigned long, cpu_scale) = SCHED_CAPACITY_SCALE;
+DEFINE_PER_CPU(unsigned long, freq_scale) = SCHED_CAPACITY_SCALE;
 
-unsigned long topology_get_cpu_scale(struct sched_domain *sd, int cpu)
+void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq,
+                        unsigned long max_freq)
 {
-       return per_cpu(cpu_scale, cpu);
+       unsigned long scale;
+       int i;
+
+       scale = (cur_freq << SCHED_CAPACITY_SHIFT) / max_freq;
+
+       for_each_cpu(i, cpus)
+               per_cpu(freq_scale, i) = scale;
 }
 
+static DEFINE_MUTEX(cpu_scale_mutex);
+DEFINE_PER_CPU(unsigned long, cpu_scale) = SCHED_CAPACITY_SCALE;
+
 void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity)
 {
        per_cpu(cpu_scale, cpu) = capacity;
@@ -212,6 +221,8 @@ static struct notifier_block init_cpu_capacity_notifier __initdata = {
 
 static int __init register_cpufreq_notifier(void)
 {
+       int ret;
+
        /*
         * on ACPI-based systems we need to use the default cpu capacity
         * until we have the necessary code to parse the cpu capacity, so
@@ -227,8 +238,13 @@ static int __init register_cpufreq_notifier(void)
 
        cpumask_copy(cpus_to_visit, cpu_possible_mask);
 
-       return cpufreq_register_notifier(&init_cpu_capacity_notifier,
-                                        CPUFREQ_POLICY_NOTIFIER);
+       ret = cpufreq_register_notifier(&init_cpu_capacity_notifier,
+                                       CPUFREQ_POLICY_NOTIFIER);
+
+       if (ret)
+               free_cpumask_var(cpus_to_visit);
+
+       return ret;
 }
 core_initcall(register_cpufreq_notifier);
 
@@ -236,6 +252,7 @@ static void __init parsing_done_workfn(struct work_struct *work)
 {
        cpufreq_unregister_notifier(&init_cpu_capacity_notifier,
                                         CPUFREQ_POLICY_NOTIFIER);
+       free_cpumask_var(cpus_to_visit);
 }
 
 #else