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

[Viresh Kumar]

On 2 February 2015 at 09:36, ethan zhao <ethan.zhao@xxxxxxxxxx> 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);
}
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