[PATCH V3 3/3] cpufreq: governor: Process remote callback for shared policies

From	Viresh Kumar <viresh.kumar@linaro.org>
Newsgroups	linux.kernel
Subject	[PATCH V3 3/3] cpufreq: governor: Process remote callback for shared policies
Date	2017-07-13 08:50 +0200
Message-ID	<u2G6K-2a4-25@gated-at.bofh.it> (permalink)
References	<u2G6J-2a4-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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This patch updates the legacy governors (ondemand/conservative) to
process cpufreq utilization update hooks to be called for remote CPUs.

Proper locking is already in place for shared policies and nothing extra
is required to be done.

Based on initial work from Steve Muckle.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/cpufreq/cpufreq_governor.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c
index 606b1a37a1af..0b49fc8bb91d 100644
--- a/drivers/cpufreq/cpufreq_governor.c
+++ b/drivers/cpufreq/cpufreq_governor.c
@@ -275,8 +275,8 @@ static void dbs_update_util_handler(struct update_util_data *data, u64 time,
 	struct policy_dbs_info *policy_dbs = cdbs->policy_dbs;
 	u64 delta_ns, lst;
 
-	/* Don't allow remote callbacks */
-	if (smp_processor_id() != data->cpu)
+	/* Allow remote callbacks only on the CPUs sharing cpufreq policy */
+	if (!cpumask_test_cpu(smp_processor_id(), policy_dbs->policy->cpus))
 		return;
 
 	/*
-- 
2.13.0.71.gd7076ec9c9cb

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[PATCH V3 3/3] cpufreq: governor: Process remote callback for shared policies Viresh Kumar <viresh.kumar@linaro.org> - 2017-07-13 08:50 +0200

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