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cpufreq: schedutil: irq-work and mutex are only used in slow path

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Execute the irq-work specific initialization/exit code only when the
fast path isn't available.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2016-11-15 13:53:23 +05:30 committed by Rafael J. Wysocki
parent 02a7b1ee3b
commit 21ef57297b
1 changed files with 8 additions and 5 deletions
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13
kernel/sched/cpufreq_schedutil.c
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@ -390,15 +390,12 @@ static struct sugov_policy *sugov_policy_alloc(struct cpufreq_policy *policy)
return NULL;
sg_policy->policy = policy;
init_irq_work(&sg_policy->irq_work, sugov_irq_work);
mutex_init(&sg_policy->work_lock);
raw_spin_lock_init(&sg_policy->update_lock);
return sg_policy;
}
static void sugov_policy_free(struct sugov_policy *sg_policy)
{
mutex_destroy(&sg_policy->work_lock);
kfree(sg_policy);
}
@ -432,6 +429,9 @@ static int sugov_kthread_create(struct sugov_policy *sg_policy)
sg_policy->thread = thread;
kthread_bind_mask(thread, policy->related_cpus);
init_irq_work(&sg_policy->irq_work, sugov_irq_work);
mutex_init(&sg_policy->work_lock);
wake_up_process(thread);
return 0;
@ -445,6 +445,7 @@ static void sugov_kthread_stop(struct sugov_policy *sg_policy)
kthread_flush_worker(&sg_policy->worker);
kthread_stop(sg_policy->thread);
mutex_destroy(&sg_policy->work_lock);
}
static struct sugov_tunables *sugov_tunables_alloc(struct sugov_policy *sg_policy)
@ -611,8 +612,10 @@ static void sugov_stop(struct cpufreq_policy *policy)
synchronize_sched();
irq_work_sync(&sg_policy->irq_work);
kthread_cancel_work_sync(&sg_policy->work);
if (!policy->fast_switch_enabled) {
irq_work_sync(&sg_policy->irq_work);
kthread_cancel_work_sync(&sg_policy->work);
}
}
static void sugov_limits(struct cpufreq_policy *policy)