cpuidle / sysfs: change function parameter

The function needs the cpuidle_device which is initially passed to the
caller.

The current code gets the struct device from the struct cpuidle_device,
pass it the cpuidle_add_sysfs function. This function calls
per_cpu(cpuidle_devices, cpu) to get the cpuidle_device.

This patch pass the cpuidle_device instead and simplify the code.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

3 files changed, 8 insertions, 16 deletions

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 7f15b8514a18..b511ac39cc85 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -394,7 +394,6 @@ EXPORT_SYMBOL_GPL(cpuidle_disable_device);
 static int __cpuidle_register_device(struct cpuidle_device *dev)
 {
         int ret;
-        struct device *cpu_dev = get_cpu_device((unsigned long)dev->cpu);
         struct cpuidle_driver *cpuidle_driver = cpuidle_get_driver();
 
         if (!try_module_get(cpuidle_driver->owner))
@@ -404,7 +403,7 @@ static int __cpuidle_register_device(struct cpuidle_device *dev)
 
         per_cpu(cpuidle_devices, dev->cpu) = dev;
         list_add(&dev->device_list, &cpuidle_detected_devices);
-        ret = cpuidle_add_sysfs(cpu_dev);
+        ret = cpuidle_add_sysfs(dev);
         if (ret)
                 goto err_sysfs;
 
@@ -416,7 +415,7 @@ static int __cpuidle_register_device(struct cpuidle_device *dev)
         return 0;
 
 err_coupled:
-        cpuidle_remove_sysfs(cpu_dev);
+        cpuidle_remove_sysfs(dev);
         wait_for_completion(&dev->kobj_unregister);
 err_sysfs:
         list_del(&dev->device_list);
@@ -460,7 +459,6 @@ EXPORT_SYMBOL_GPL(cpuidle_register_device);
  */
 void cpuidle_unregister_device(struct cpuidle_device *dev)
 {
-        struct device *cpu_dev = get_cpu_device((unsigned long)dev->cpu);
         struct cpuidle_driver *cpuidle_driver = cpuidle_get_driver();
 
         if (dev->registered == 0)
@@ -470,7 +468,7 @@ void cpuidle_unregister_device(struct cpuidle_device *dev)
 
         cpuidle_disable_device(dev);
 
-        cpuidle_remove_sysfs(cpu_dev);
+        cpuidle_remove_sysfs(dev);
         list_del(&dev->device_list);
         wait_for_completion(&dev->kobj_unregister);
         per_cpu(cpuidle_devices, dev->cpu) = NULL;
diff --git a/drivers/cpuidle/cpuidle.h b/drivers/cpuidle/cpuidle.h
index 76e7f696ad8c..2120d9e937c7 100644
--- a/drivers/cpuidle/cpuidle.h
+++ b/drivers/cpuidle/cpuidle.h
@@ -29,8 +29,8 @@ extern int cpuidle_add_interface(struct device *dev);
 extern void cpuidle_remove_interface(struct device *dev);
 extern int cpuidle_add_state_sysfs(struct cpuidle_device *device);
 extern void cpuidle_remove_state_sysfs(struct cpuidle_device *device);
-extern int cpuidle_add_sysfs(struct device *dev);
-extern void cpuidle_remove_sysfs(struct device *dev);
+extern int cpuidle_add_sysfs(struct cpuidle_device *dev);
+extern void cpuidle_remove_sysfs(struct cpuidle_device *dev);
 
 #ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
 bool cpuidle_state_is_coupled(struct cpuidle_device *dev,
diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c
index 5f809e337b89..84e62852e50a 100644
--- a/drivers/cpuidle/sysfs.c
+++ b/drivers/cpuidle/sysfs.c
@@ -408,13 +408,11 @@ void cpuidle_remove_state_sysfs(struct cpuidle_device *device)
  * cpuidle_add_sysfs - creates a sysfs instance for the target device
  * @dev: the target device
  */
-int cpuidle_add_sysfs(struct device *cpu_dev)
+int cpuidle_add_sysfs(struct cpuidle_device *dev)
 {
-        int cpu = cpu_dev->id;
-        struct cpuidle_device *dev;
+        struct device *cpu_dev = get_cpu_device((unsigned long)dev->cpu);
         int error;
 
-        dev = per_cpu(cpuidle_devices, cpu);
         error = kobject_init_and_add(&dev->kobj, &ktype_cpuidle, &cpu_dev->kobj,
                                      "cpuidle");
         if (!error)
@@ -426,11 +424,7 @@ int cpuidle_add_sysfs(struct device *cpu_dev)
  * cpuidle_remove_sysfs - deletes a sysfs instance on the target device
  * @dev: the target device
  */
-void cpuidle_remove_sysfs(struct device *cpu_dev)
+void cpuidle_remove_sysfs(struct cpuidle_device *dev)
 {
-        int cpu = cpu_dev->id;
-        struct cpuidle_device *dev;
-
-        dev = per_cpu(cpuidle_devices, cpu);
         kobject_put(&dev->kobj);
 }