On Mon, May 23, 2011 at 06:12:15PM -0500, Nishanth Menon wrote:
> cpufreq table allocated by opp_init_cpufreq_table is better
> freed by OPP layer itself. This allows future modifications to
> the table handling to be transparent to the users.
...
> +void opp_free_cpufreq_table(struct device *dev,
> + struct cpufreq_frequency_table **table)
> +{
> + if (!table)
> + return;
> +
> + /* Pretend as if I am an updater */
> + mutex_lock(&dev_opp_list_lock);
> + kfree(*table);
> + *table = NULL;
> + mutex_unlock(&dev_opp_list_lock);
> +}
Not clear what the mutex protects here. Currently it protects only
device opp list modifications. opp_init_cpufreq_table holds the lock only
while looking up and walking the device opp list; the cpufreq table it
creates is not complete by the time the lock is dropped.
Todd
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