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

[ethan zhao]

On 2015/2/2 11:59, Viresh Kumar wrote:
> On 2 February 2015 at 09:26, ethan zhao <ethan.zhao@xxxxxxxxxx> wrote:
> >   How to prevent the policy to be freed between
> >
> > cpufreq_cpu_get()  and cpufreq_cpu_put() ?
> kobject_get() increases the reference count of a policy and the policy
> will only be freed when this is zero. And it will only be zero once all
> cpufreq_cpu_get() are matched with corresponding cpufreq_cpu_put().
 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.

 Thanks,
 Ethan
> > You are maxing up the water with sand ?
> :)

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/