Patch "cpufreq: Do not clear real_cpus mask on policy init" has been added to the 4.9-stable tree

Patch "cpufreq: Do not clear real_cpus mask on policy init" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    cpufreq: Do not clear real_cpus mask on policy init

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     cpufreq-do-not-clear-real_cpus-mask-on-policy-init.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Mon Nov  6 10:07:35 CET 2017
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Sat, 7 Oct 2017 22:36:46 +0000
Subject: cpufreq: Do not clear real_cpus mask on policy init

From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>


[ Upstream commit f451014692ae34e587b00de6745e16661cf734d8 ]

If new_policy is set in cpufreq_online(), the policy object has just
been created and its real_cpus mask has been zeroed on allocation,
and the driver's ->init() callback should not touch it.

It doesn't need to be cleared again, so don't do that.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/cpufreq/cpufreq.c |    2 --
 1 file changed, 2 deletions(-)

--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1172,8 +1172,6 @@ static int cpufreq_online(unsigned int c
 	if (new_policy) {
 		/* related_cpus should at least include policy->cpus. */
 		cpumask_copy(policy->related_cpus, policy->cpus);
-		/* Clear mask of registered CPUs */
-		cpumask_clear(policy->real_cpus);
 	}
 
 	/*


Patches currently in stable-queue which might be from rafael.j.wysocki@intel.com are

queue-4.9/pm-wakeirq-report-a-wakeup_event-on-dedicated-wekup-irq.patch
queue-4.9/cpufreq-do-not-clear-real_cpus-mask-on-policy-init.patch