Re: [PATCH Resend] cpufreq: Set cpufreq_cpu_data to NULL before putting kobject

Viresh Kumar
2015-02-02T04:09:45Z

On 2 February 2015 at 09:36, ethan zhao <ethan.zhao@oracle.com> wrote:
> Is that an idea it supposed to be or fact ?
>
> if (!cpufreq_suspended)
> cpufreq_policy_free(policy);
>
> static void cpufreq_policy_free(struct cpufreq_policy *policy)
> {
> free_cpumask_var(policy->related_cpus);
> free_cpumask_var(policy->cpus);
> kfree(policy);
> }
>
> It seems you just think about it ideally in mind.

if (!cpufreq_suspended)
cpufreq_policy_put_kobj(policy);

static void cpufreq_policy_put_kobj(struct cpufreq_policy *policy)
{
...

kobject_put(kobj);

/*
* We need to make sure that the underlying kobj is
* actually not referenced anymore by anybody before we
* proceed with unloading.
*/
pr_debug("waiting for dropping of refcount\n");
wait_for_completion(cmp);
}