lkml.org 
[lkml]   [2018]   [May]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/2] Revert "cpufreq: Remove policy create/remove notifiers"
Date
This reverts commit f9f41e3ef99ac9d4e91b07634362e393fb929aad.

Change-Id: Iddde3ef56c9e5b14dcb14f8737899b85e56f5b43
---
drivers/cpufreq/cpufreq.c | 16 +++++++++++-----
include/linux/cpufreq.h | 3 +++
2 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 075d18f..f790686 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1129,11 +1129,15 @@ static struct cpufreq_policy *cpufreq_policy_alloc(unsigned int cpu)
return NULL;
}

-static void cpufreq_policy_put_kobj(struct cpufreq_policy *policy)
+static void cpufreq_policy_put_kobj(struct cpufreq_policy *policy, bool notify)
{
struct kobject *kobj;
struct completion *cmp;

+ if (notify)
+ blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
+ CPUFREQ_REMOVE_POLICY, policy);
+
down_write(&policy->rwsem);
cpufreq_stats_free_table(policy);
kobj = &policy->kobj;
@@ -1151,7 +1155,7 @@ static void cpufreq_policy_put_kobj(struct cpufreq_policy *policy)
pr_debug("wait complete\n");
}

-static void cpufreq_policy_free(struct cpufreq_policy *policy)
+static void cpufreq_policy_free(struct cpufreq_policy *policy, bool notify)
{
unsigned long flags;
int cpu;
@@ -1164,7 +1168,7 @@ static void cpufreq_policy_free(struct cpufreq_policy *policy)
per_cpu(cpufreq_cpu_data, cpu) = NULL;
write_unlock_irqrestore(&cpufreq_driver_lock, flags);

- cpufreq_policy_put_kobj(policy);
+ cpufreq_policy_put_kobj(policy, notify);
free_cpumask_var(policy->real_cpus);
free_cpumask_var(policy->related_cpus);
free_cpumask_var(policy->cpus);
@@ -1296,6 +1300,8 @@ static int cpufreq_online(unsigned int cpu)
goto out_destroy_policy;

cpufreq_stats_create_table(policy);
+ blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
+ CPUFREQ_CREATE_POLICY, policy);

write_lock_irqsave(&cpufreq_driver_lock, flags);
list_add(&policy->policy_list, &cpufreq_policy_list);
@@ -1334,7 +1340,7 @@ static int cpufreq_online(unsigned int cpu)
cpufreq_driver->exit(policy);

out_free_policy:
- cpufreq_policy_free(policy);
+ cpufreq_policy_free(policy, !new_policy);
return ret;
}

@@ -1447,7 +1453,7 @@ static void cpufreq_remove_dev(struct device *dev, struct subsys_interface *sif)
remove_cpu_dev_symlink(policy, dev);

if (cpumask_empty(policy->real_cpus))
- cpufreq_policy_free(policy);
+ cpufreq_policy_free(policy, true);
}

/**
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 87f48dd..b6209b3 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -437,6 +437,9 @@ static inline void cpufreq_resume(void) {}
/* Policy Notifiers */
#define CPUFREQ_ADJUST (0)
#define CPUFREQ_NOTIFY (1)
+#define CPUFREQ_START (2)
+#define CPUFREQ_CREATE_POLICY (3)
+#define CPUFREQ_REMOVE_POLICY (4)

#ifdef CONFIG_CPU_FREQ
int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
--
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
\
 
 \ /
  Last update: 2018-05-18 10:26    [W:0.049 / U:0.720 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site