POWERPC: pseries: cpuidle: use the common cpuidle_[un]register() routines

It is now possible to use the common cpuidle_[un]register() routines
(instead of open-coding them) so do it.

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 3 insertions, 54 deletions

diff --git a/arch/powerpc/platforms/pseries/processor_idle.c b/arch/powerpc/platforms/pseries/processor_idle.c
index 8aa8c40008b3..94134a5aecaa 100644
--- a/arch/powerpc/platforms/pseries/processor_idle.c
+++ b/arch/powerpc/platforms/pseries/processor_idle.c
@@ -28,7 +28,6 @@ struct cpuidle_driver pseries_idle_driver = {
 #define MAX_IDLE_STATE_COUNT    2
 
 static int max_idle_state = MAX_IDLE_STATE_COUNT - 1;
-static struct cpuidle_device __percpu *pseries_cpuidle_devices;
 static struct cpuidle_state *cpuidle_state_table;
 
 static inline void idle_loop_prolog(unsigned long *in_purr)
@@ -191,7 +190,7 @@ static int pseries_cpuidle_add_cpu_notifier(struct notifier_block *n,
 {
         int hotcpu = (unsigned long)hcpu;
         struct cpuidle_device *dev =
-                        per_cpu_ptr(pseries_cpuidle_devices, hotcpu);
+                        per_cpu_ptr(cpuidle_devices, hotcpu);
 
         if (dev && cpuidle_get_driver()) {
                 switch (action) {
@@ -248,48 +247,6 @@ static int pseries_cpuidle_driver_init(void)
         return 0;
 }
 
-/* pseries_idle_devices_uninit(void)
- * unregister cpuidle devices and de-allocate memory
- */
-static void pseries_idle_devices_uninit(void)
-{
-        int i;
-        struct cpuidle_device *dev;
-
-        for_each_possible_cpu(i) {
-                dev = per_cpu_ptr(pseries_cpuidle_devices, i);
-                cpuidle_unregister_device(dev);
-        }
-
-        free_percpu(pseries_cpuidle_devices);
-        return;
-}
-
-/* pseries_idle_devices_init()
- * allocate, initialize and register cpuidle device
- */
-static int pseries_idle_devices_init(void)
-{
-        int i;
-        struct cpuidle_device *dev;
-
-        pseries_cpuidle_devices = alloc_percpu(struct cpuidle_device);
-        if (pseries_cpuidle_devices == NULL)
-                return -ENOMEM;
-
-        for_each_possible_cpu(i) {
-                dev = per_cpu_ptr(pseries_cpuidle_devices, i);
-                dev->cpu = i;
-                if (cpuidle_register_device(dev)) {
-                        printk(KERN_DEBUG \
-                                "cpuidle_register_device %d failed!\n", i);
-                        return -EIO;
-                }
-        }
-
-        return 0;
-}
-
 /*
  * pseries_idle_probe()
  * Choose state table for shared versus dedicated partition
@@ -325,19 +282,12 @@ static int __init pseries_processor_idle_init(void)
                 return retval;
 
         pseries_cpuidle_driver_init();
-        retval = cpuidle_register_driver(&pseries_idle_driver);
+        retval = cpuidle_register(&pseries_idle_driver, NULL);
         if (retval) {
                 printk(KERN_DEBUG "Registration of pseries driver failed.\n");
                 return retval;
         }
 
-        retval = pseries_idle_devices_init();
-        if (retval) {
-                pseries_idle_devices_uninit();
-                cpuidle_unregister_driver(&pseries_idle_driver);
-                return retval;
-        }
-
         register_cpu_notifier(&setup_hotplug_notifier);
         printk(KERN_DEBUG "pseries_idle_driver registered\n");
 
@@ -348,8 +298,7 @@ static void __exit pseries_processor_idle_exit(void)
 {
 
         unregister_cpu_notifier(&setup_hotplug_notifier);
-        pseries_idle_devices_uninit();
-        cpuidle_unregister_driver(&pseries_idle_driver);
+        cpuidle_unregister(&pseries_idle_driver);
 
         return;
 }