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    SubjectRe: [RFC PATCH 08/19] cpufreq: fix warning for cpufreq_init_policy unlocked access to cpufreq_governor_list
    On 11-01-16, 17:35, Juri Lelli wrote:
    > diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
    > index 7dae7f3..d065435 100644
    > --- a/drivers/cpufreq/cpufreq.c
    > +++ b/drivers/cpufreq/cpufreq.c
    > @@ -969,6 +969,7 @@ static int cpufreq_init_policy(struct cpufreq_policy *policy)
    >
    > memcpy(&new_policy, policy, sizeof(*policy));
    >
    > + mutex_lock(&cpufreq_governor_mutex);
    > /* Update governor of new_policy to the governor used before hotplug */
    > gov = find_governor(policy->last_governor);

    You should take the lock within find_governor() instead, i.e. around
    the while loop.

    > if (gov)
    > @@ -976,6 +977,7 @@ static int cpufreq_init_policy(struct cpufreq_policy *policy)
    > policy->governor->name, policy->cpu);
    > else
    > gov = CPUFREQ_DEFAULT_GOVERNOR;
    > + mutex_unlock(&cpufreq_governor_mutex);
    >
    > new_policy.governor = gov;
    >
    > --
    > 2.2.2

    --
    viresh

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