[PATCH 1/3] cpufreq: stats: Remove redundant cpufreq_cpu_get() call

[Saravana Kannan]

__cpufreq_stats_create_table always gets pass the valid and real policy
struct. So, there's no need to call cpufreq_cpu_get() to get the policy
again.

Change-Id: I0136b3e67018ee3af2335906407f55d8c6219f71
Signed-off-by: Saravana Kannan <skan...@codeaurora.org>
---

Viresh/Rafael,

These 3 patches is the approximate code I have in mind.

Approximate because:
* I inserted one question as a comment into the code.
* If the patch doesn't have any bugs, the plan is to remove
  cpufreq_generic_get() and references to it.

This takes care of the "don't advertise before it's ready for use" rule.

Viresh,

I think the locking updates needs to be done in addition to this.

Regards,
Saravana

 drivers/cpufreq/cpufreq_stats.c | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
index 5793e14..e4bd27f 100644
--- a/drivers/cpufreq/cpufreq_stats.c
+++ b/drivers/cpufreq/cpufreq_stats.c
@@ -185,7 +185,6 @@ static int __cpufreq_stats_create_table(struct 
cpufreq_policy *policy,
 {
        unsigned int i, j, count = 0, ret = 0;
        struct cpufreq_stats *stat;
-       struct cpufreq_policy *current_policy;
        unsigned int alloc_size;
        unsigned int cpu = policy->cpu;
        if (per_cpu(cpufreq_stats_table, cpu))
@@ -194,13 +193,7 @@ static int __cpufreq_stats_create_table(struct 
cpufreq_policy *policy,
        if ((stat) == NULL)
                return -ENOMEM;
 
-       current_policy = cpufreq_cpu_get(cpu);
-       if (current_policy == NULL) {
-               ret = -EINVAL;
-               goto error_get_fail;
-       }
-
-       ret = sysfs_create_group(&current_policy->kobj, &stats_attr_group);
+       ret = sysfs_create_group(&policy->kobj, &stats_attr_group);
        if (ret)
                goto error_out;
 
@@ -243,11 +236,8 @@ static int __cpufreq_stats_create_table(struct 
cpufreq_policy *policy,
        stat->last_time = get_jiffies_64();
        stat->last_index = freq_table_get_index(stat, policy->cur);
        spin_unlock(&cpufreq_stats_lock);
-       cpufreq_cpu_put(current_policy);
        return 0;
 error_out:
-       cpufreq_cpu_put(current_policy);
-error_get_fail:
        kfree(stat);
        per_cpu(cpufreq_stats_table, cpu) = NULL;
        return ret;
-- 
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