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authorFrode Isaksen <fisaksen@baylibre.com>2017-12-19 11:15:35 +0000
committerJan-Simon Moeller <jsmoeller@linuxfoundation.org>2018-02-07 11:47:29 +0000
commitc4a6287185179732dfc1e903c195ff90c19f1065 (patch)
treed35f5010dbd952e40f5c178322026445b55757c1 /meta-eas/recipes-kernel/linux/linux-renesas/0019-cpufreq-schedutil-irq-work-and-mutex-are-only-used-i.patch
parent109dea1d5c5a38807b098b588584636ae636a302 (diff)
This layer provides Energy Aware Scheduling (EAS) patcheseel_5.1.0eel_5.0.3eel_5.0.2eel/5.1.0eel/5.0.3eel/5.0.25.1.05.0.35.0.2eel
For the moment only for Renesas R-Car Gen3 SoC's. Can be expanded for other SoC's by setting the machine feature biglittle and provide the relevant EAS patches. Bug-AGL: SPEC-813 Change-Id: I2b5e69c515c33e57be19b30466fe208d7b8ac1a5 Signed-off-by: Frode Isaksen <fisaksen@baylibre.com>
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.patch71
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
+