On 2 August 2013 10:07, Viresh Kumar <viresh.kumar@xxxxxxxxxx> wrote:
>> @@ -908,7 +905,8 @@ static int cpufreq_add_policy_cpu(unsign
>> unsigned long flags;
>>
>> policy = cpufreq_cpu_get(sibling);
>
> This can be skipped completely at this place. Caller of
> cpufreq_add_policy_cpu() has got the policy pointer with it and so
> can be passed. I haven't done it earlier as the impression was we need
> to call cpufreq_cpu_get()..
And here is the fixup to do this (attached too):
---
drivers/cpufreq/cpufreq.c | 18 ++++++------------
1 file changed, 6 insertions(+), 12 deletions(-)
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 46e70ae..47f2a6e 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -889,21 +889,17 @@ static void cpufreq_init_policy(struct
cpufreq_policy *policy)
}
#ifdef CONFIG_HOTPLUG_CPU
-static int cpufreq_add_policy_cpu(unsigned int cpu, unsigned int sibling,
- struct device *dev, bool frozen)
+static int cpufreq_add_policy_cpu(struct cpufreq_policy *policy,
+ unsigned int cpu, struct device *dev,
+ bool frozen)
{
- struct cpufreq_policy *policy;
int ret = 0, has_target = !!cpufreq_driver->target;
unsigned long flags;
- policy = cpufreq_cpu_get(sibling);
- if (WARN_ON_ONCE(!policy))
- return -ENODATA;
-
if (has_target)
__cpufreq_governor(policy, CPUFREQ_GOV_STOP);
- lock_policy_rwsem_write(sibling);
+ lock_policy_rwsem_write(policy->cpu);
write_lock_irqsave(&cpufreq_driver_lock, flags);
@@ -912,7 +908,7 @@ static int cpufreq_add_policy_cpu(unsigned int
cpu, unsigned int sibling,
per_cpu(cpufreq_cpu_data, cpu) = policy;
write_unlock_irqrestore(&cpufreq_driver_lock, flags);
- unlock_policy_rwsem_write(sibling);
+ unlock_policy_rwsem_write(policy->cpu);
if (has_target) {
__cpufreq_governor(policy, CPUFREQ_GOV_START);
@@ -923,7 +919,6 @@ static int cpufreq_add_policy_cpu(unsigned int
cpu, unsigned int sibling,
if (!frozen)
ret = sysfs_create_link(&dev->kobj, &policy->kobj, "cpufreq");
- cpufreq_cpu_put(policy);
return ret;
}
#endif
@@ -1006,8 +1001,7 @@ static int __cpufreq_add_dev(struct device *dev,
struct subsys_interface *sif,
struct cpufreq_policy *cp = per_cpu(cpufreq_cpu_data, sibling);
if (cp && cpumask_test_cpu(cpu, cp->related_cpus)) {
read_unlock_irqrestore(&cpufreq_driver_lock, flags);
- return cpufreq_add_policy_cpu(cpu, sibling, dev,
- frozen);
+ return cpufreq_add_policy_cpu(cp, cpu, dev, frozen);
}
}
read_unlock_irqrestore(&cpufreq_driver_lock, flags);
Attachment:
0001-Fix.patch
Description: Binary data
