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Subject[PATCH 3/8] cpufreq: Add helper to perform alloc/free of policy structure
Date
Separate out the allocation of the cpufreq policy structure (along with
its error handling) to a helper function. This makes the code easier to
read and also helps with some upcoming code reorganization.

Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
---

drivers/cpufreq/cpufreq.c | 50 ++++++++++++++++++++++++++++++++-------------
1 file changed, 35 insertions(+), 15 deletions(-)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index f8c3100..ca14dc2 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -943,6 +943,37 @@ static int cpufreq_add_policy_cpu(unsigned int cpu, unsigned int sibling,
}
#endif

+static struct cpufreq_policy *cpufreq_policy_alloc(void)
+{
+ struct cpufreq_policy *policy;
+
+ policy = kzalloc(sizeof(struct cpufreq_policy), GFP_KERNEL);
+ if (!policy)
+ return NULL;
+
+ if (!alloc_cpumask_var(&policy->cpus, GFP_KERNEL))
+ goto err_free_policy;
+
+ if (!zalloc_cpumask_var(&policy->related_cpus, GFP_KERNEL))
+ goto err_free_cpumask;
+
+ return policy;
+
+err_free_cpumask:
+ free_cpumask_var(policy->cpus);
+err_free_policy:
+ kfree(policy);
+
+ return NULL;
+}
+
+static void cpufreq_policy_free(struct cpufreq_policy *policy)
+{
+ free_cpumask_var(policy->related_cpus);
+ free_cpumask_var(policy->cpus);
+ kfree(policy);
+}
+
/**
* cpufreq_add_dev - add a CPU device
*
@@ -996,16 +1027,10 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
goto module_out;
}

- policy = kzalloc(sizeof(struct cpufreq_policy), GFP_KERNEL);
+ policy = cpufreq_policy_alloc();
if (!policy)
goto nomem_out;

- if (!alloc_cpumask_var(&policy->cpus, GFP_KERNEL))
- goto err_free_policy;
-
- if (!zalloc_cpumask_var(&policy->related_cpus, GFP_KERNEL))
- goto err_free_cpumask;
-
policy->cpu = cpu;
policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
cpumask_copy(policy->cpus, cpumask_of(cpu));
@@ -1070,11 +1095,7 @@ err_out_unregister:

err_set_policy_cpu:
per_cpu(cpufreq_policy_cpu, cpu) = -1;
- free_cpumask_var(policy->related_cpus);
-err_free_cpumask:
- free_cpumask_var(policy->cpus);
-err_free_policy:
- kfree(policy);
+ cpufreq_policy_free(policy);
nomem_out:
module_put(cpufreq_driver->owner);
module_out:
@@ -1201,9 +1222,8 @@ static int __cpufreq_remove_dev(struct device *dev,
if (cpufreq_driver->exit)
cpufreq_driver->exit(data);

- free_cpumask_var(data->related_cpus);
- free_cpumask_var(data->cpus);
- kfree(data);
+ cpufreq_policy_free(data);
+
} else if (cpufreq_driver->target) {
__cpufreq_governor(data, CPUFREQ_GOV_START);
__cpufreq_governor(data, CPUFREQ_GOV_LIMITS);


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