| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Wed, 22 Jul 2015 04:09:08 +0200
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Linux PM list <linux-pm@...r.kernel.org>,
Viresh Kumar <viresh.kumar@...aro.org>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH] cpufreq: Drop unnecessary arguments from two functions
From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
The second sif argument of __cpufreq_remove_dev_prepare() is
never used by it, so drop it.
The second sif argument of __cpufreq_remove_dev_finish() is only
used for one check that is not necessary if the policy is freed
by cpufreq_remove_dev() itself, so make cpufreq_remove_dev() free
the policy and drop the __cpufreq_remove_dev_finish()'s second
argument too.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
drivers/cpufreq/cpufreq.c | 33 ++++++++++++++-------------------
1 file changed, 14 insertions(+), 19 deletions(-)
Index: linux-pm/drivers/cpufreq/cpufreq.c
===================================================================
--- linux-pm.orig/drivers/cpufreq/cpufreq.c
+++ linux-pm/drivers/cpufreq/cpufreq.c
@@ -1421,8 +1421,7 @@ out_release_rwsem:
return ret;
}
-static int __cpufreq_remove_dev_prepare(struct device *dev,
- struct subsys_interface *sif)
+static int __cpufreq_remove_dev_prepare(struct device *dev)
{
unsigned int cpu = dev->id;
int ret = 0;
@@ -1474,8 +1473,7 @@ static int __cpufreq_remove_dev_prepare(
return ret;
}
-static int __cpufreq_remove_dev_finish(struct device *dev,
- struct subsys_interface *sif)
+static int __cpufreq_remove_dev_finish(struct device *dev)
{
unsigned int cpu = dev->id;
int ret;
@@ -1507,10 +1505,6 @@ static int __cpufreq_remove_dev_finish(s
if (cpufreq_driver->exit)
cpufreq_driver->exit(policy);
- /* Free the policy only if the driver is getting removed. */
- if (sif)
- cpufreq_policy_free(policy, true);
-
return 0;
}
@@ -1522,6 +1516,7 @@ static int __cpufreq_remove_dev_finish(s
static int cpufreq_remove_dev(struct device *dev, struct subsys_interface *sif)
{
unsigned int cpu = dev->id;
+ struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu);
int ret;
/*
@@ -1530,7 +1525,6 @@ static int cpufreq_remove_dev(struct dev
* link or free policy here.
*/
if (cpu_is_offline(cpu)) {
- struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu);
struct cpumask mask;
if (!policy)
@@ -1547,17 +1541,18 @@ static int cpufreq_remove_dev(struct dev
remove_cpu_dev_symlink(policy, cpu);
return 0;
}
+ } else {
+ ret = __cpufreq_remove_dev_prepare(dev);
+ if (!ret)
+ ret = __cpufreq_remove_dev_finish(dev);
- cpufreq_policy_free(policy, true);
- return 0;
+ /* The CPU is online, so the policy cannot be inactive here. */
+ if (ret)
+ return ret;
}
- ret = __cpufreq_remove_dev_prepare(dev, sif);
-
- if (!ret)
- ret = __cpufreq_remove_dev_finish(dev, sif);
-
- return ret;
+ cpufreq_policy_free(policy, true);
+ return 0;
}
static void handle_update(struct work_struct *work)
@@ -2396,11 +2391,11 @@ static int cpufreq_cpu_callback(struct n
break;
case CPU_DOWN_PREPARE:
- __cpufreq_remove_dev_prepare(dev, NULL);
+ __cpufreq_remove_dev_prepare(dev);
break;
case CPU_POST_DEAD:
- __cpufreq_remove_dev_finish(dev, NULL);
+ __cpufreq_remove_dev_finish(dev);
break;
case CPU_DOWN_FAILED:
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists