linux-kernel - [PATCH 05/10] cpufreq: Pass policy to cpufreq_add_policy

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Date:	Sat,  3 Aug 2013 17:19:23 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	rjw@...k.pl
Cc:	linaro-kernel@...ts.linaro.org, patches@...aro.org,
	cpufreq@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, srivatsa.bhat@...ux.vnet.ibm.com,
	l.majewski@...sung.com, Viresh Kumar <viresh.kumar@...aro.org>
Subject: [PATCH 05/10] cpufreq: Pass policy to cpufreq_add_policy_cpu()

Caller of cpufreq_add_policy_cpu() already has pointer to policy structure and
so there is no need to find it again in cpufreq_add_policy_cpu(). Lets pass it
directly.

Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@...ux.vnet.ibm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
 drivers/cpufreq/cpufreq.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 47773a9..496e31c 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -889,21 +889,17 @@ static void cpufreq_init_policy(struct cpufreq_policy *policy)
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
-static int cpufreq_add_policy_cpu(unsigned int cpu, unsigned int sibling,
-				  struct device *dev, bool frozen)
+static int cpufreq_add_policy_cpu(struct cpufreq_policy *policy,
+				  unsigned int cpu, struct device *dev,
+				  bool frozen)
 {
-	struct cpufreq_policy *policy;
 	int ret = 0, has_target = !!cpufreq_driver->target;
 	unsigned long flags;
 
-	policy = cpufreq_cpu_get(sibling);
-	if (WARN_ON_ONCE(!policy))
-		return -ENODATA;
-
 	if (has_target)
 		__cpufreq_governor(policy, CPUFREQ_GOV_STOP);
 
-	lock_policy_rwsem_write(sibling);
+	lock_policy_rwsem_write(policy->cpu);
 
 	write_lock_irqsave(&cpufreq_driver_lock, flags);
 
@@ -912,7 +908,7 @@ static int cpufreq_add_policy_cpu(unsigned int cpu, unsigned int sibling,
 	per_cpu(cpufreq_cpu_data, cpu) = policy;
 	write_unlock_irqrestore(&cpufreq_driver_lock, flags);
 
-	unlock_policy_rwsem_write(sibling);
+	unlock_policy_rwsem_write(policy->cpu);
 
 	if (has_target) {
 		__cpufreq_governor(policy, CPUFREQ_GOV_START);
@@ -923,7 +919,6 @@ static int cpufreq_add_policy_cpu(unsigned int cpu, unsigned int sibling,
 	if (!frozen)
 		ret = sysfs_create_link(&dev->kobj, &policy->kobj, "cpufreq");
 
-	cpufreq_cpu_put(policy);
 	return ret;
 }
 #endif
@@ -1006,8 +1001,7 @@ static int __cpufreq_add_dev(struct device *dev, struct subsys_interface *sif,
 		struct cpufreq_policy *cp = per_cpu(cpufreq_cpu_data, sibling);
 		if (cp && cpumask_test_cpu(cpu, cp->related_cpus)) {
 			read_unlock_irqrestore(&cpufreq_driver_lock, flags);
-			return cpufreq_add_policy_cpu(cpu, sibling, dev,
-						      frozen);
+			return cpufreq_add_policy_cpu(cp, cpu, dev, frozen);
 		}
 	}
 	read_unlock_irqrestore(&cpufreq_driver_lock, flags);
-- 
1.7.12.rc2.18.g61b472e

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