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path: root/drivers/cpufreq/cpufreq.c
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Diffstat (limited to 'drivers/cpufreq/cpufreq.c')
-rw-r--r--drivers/cpufreq/cpufreq.c30
1 files changed, 11 insertions, 19 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 063b2184caf..199dcb9f0b8 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -29,6 +29,8 @@
#include <linux/completion.h>
#include <linux/mutex.h>
+#include <trace/events/power.h>
+
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_CORE, \
"cpufreq-core", msg)
@@ -68,7 +70,7 @@ static DEFINE_PER_CPU(int, cpufreq_policy_cpu);
static DEFINE_PER_CPU(struct rw_semaphore, cpu_policy_rwsem);
#define lock_policy_rwsem(mode, cpu) \
-int lock_policy_rwsem_##mode \
+static int lock_policy_rwsem_##mode \
(int cpu) \
{ \
int policy_cpu = per_cpu(cpufreq_policy_cpu, cpu); \
@@ -83,26 +85,22 @@ int lock_policy_rwsem_##mode \
}
lock_policy_rwsem(read, cpu);
-EXPORT_SYMBOL_GPL(lock_policy_rwsem_read);
lock_policy_rwsem(write, cpu);
-EXPORT_SYMBOL_GPL(lock_policy_rwsem_write);
-void unlock_policy_rwsem_read(int cpu)
+static void unlock_policy_rwsem_read(int cpu)
{
int policy_cpu = per_cpu(cpufreq_policy_cpu, cpu);
BUG_ON(policy_cpu == -1);
up_read(&per_cpu(cpu_policy_rwsem, policy_cpu));
}
-EXPORT_SYMBOL_GPL(unlock_policy_rwsem_read);
-void unlock_policy_rwsem_write(int cpu)
+static void unlock_policy_rwsem_write(int cpu)
{
int policy_cpu = per_cpu(cpufreq_policy_cpu, cpu);
BUG_ON(policy_cpu == -1);
up_write(&per_cpu(cpu_policy_rwsem, policy_cpu));
}
-EXPORT_SYMBOL_GPL(unlock_policy_rwsem_write);
/* internal prototypes */
@@ -354,6 +352,9 @@ void cpufreq_notify_transition(struct cpufreq_freqs *freqs, unsigned int state)
case CPUFREQ_POSTCHANGE:
adjust_jiffies(CPUFREQ_POSTCHANGE, freqs);
+ dprintk("FREQ: %lu - CPU: %lu", (unsigned long)freqs->new,
+ (unsigned long)freqs->cpu);
+ trace_power_frequency(POWER_PSTATE, freqs->new, freqs->cpu);
srcu_notifier_call_chain(&cpufreq_transition_notifier_list,
CPUFREQ_POSTCHANGE, freqs);
if (likely(policy) && likely(policy->cpu == freqs->cpu))
@@ -1077,6 +1078,7 @@ err_out_unregister:
err_unlock_policy:
unlock_policy_rwsem_write(cpu);
+ free_cpumask_var(policy->related_cpus);
err_free_cpumask:
free_cpumask_var(policy->cpus);
err_free_policy:
@@ -1762,17 +1764,8 @@ static int __cpufreq_set_policy(struct cpufreq_policy *data,
dprintk("governor switch\n");
/* end old governor */
- if (data->governor) {
- /*
- * Need to release the rwsem around governor
- * stop due to lock dependency between
- * cancel_delayed_work_sync and the read lock
- * taken in the delayed work handler.
- */
- unlock_policy_rwsem_write(data->cpu);
+ if (data->governor)
__cpufreq_governor(data, CPUFREQ_GOV_STOP);
- lock_policy_rwsem_write(data->cpu);
- }
/* start new governor */
data->governor = policy->governor;
@@ -1883,8 +1876,7 @@ static int __cpuinit cpufreq_cpu_callback(struct notifier_block *nfb,
return NOTIFY_OK;
}
-static struct notifier_block __refdata cpufreq_cpu_notifier =
-{
+static struct notifier_block __refdata cpufreq_cpu_notifier = {
.notifier_call = cpufreq_cpu_callback,
};