diff options
Diffstat (limited to 'meta-eas/recipes-kernel/linux/linux-renesas/0019-cpufreq-schedutil-irq-work-and-mutex-are-only-used-i.patch')
| -rw-r--r-- | meta-eas/recipes-kernel/linux/linux-renesas/0019-cpufreq-schedutil-irq-work-and-mutex-are-only-used-i.patch | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/meta-eas/recipes-kernel/linux/linux-renesas/0019-cpufreq-schedutil-irq-work-and-mutex-are-only-used-i.patch b/meta-eas/recipes-kernel/linux/linux-renesas/0019-cpufreq-schedutil-irq-work-and-mutex-are-only-used-i.patch new file mode 100644 index 0000000..94c768a --- /dev/null +++ b/meta-eas/recipes-kernel/linux/linux-renesas/0019-cpufreq-schedutil-irq-work-and-mutex-are-only-used-i.patch @@ -0,0 +1,71 @@ +From fad60e6f1b0de5e37cb4e0ae8a4a769ef821950f Mon Sep 17 00:00:00 2001 +From: Viresh Kumar <viresh.kumar@linaro.org> +Date: Tue, 15 Nov 2016 13:53:23 +0530 +Subject: [PATCH 19/92] cpufreq: schedutil: irq-work and mutex are only used in + slow path + +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> +(cherry picked from commit 21ef57297b15a49b0c4dd4e7135c1a08e9a29a1c) +Signed-off-by: Gaku Inami <gaku.inami.xw@bp.renesas.com> +--- + kernel/sched/cpufreq_schedutil.c | 13 ++++++++----- + 1 file changed, 8 insertions(+), 5 deletions(-) + +diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c +index f165ba0..42a220e 100644 +--- a/kernel/sched/cpufreq_schedutil.c ++++ b/kernel/sched/cpufreq_schedutil.c +@@ -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) +-- +1.9.1 + |