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-rw-r--r--drivers/cpuidle/coupled.c75
-rw-r--r--drivers/cpuidle/cpuidle-arm.c1
-rw-r--r--drivers/cpuidle/cpuidle-powernv.c51
-rw-r--r--drivers/cpuidle/cpuidle-pseries.c51
-rw-r--r--drivers/cpuidle/driver.c5
5 files changed, 83 insertions, 100 deletions
diff --git a/drivers/cpuidle/coupled.c b/drivers/cpuidle/coupled.c
index d5657d50ac40..71e586d7df71 100644
--- a/drivers/cpuidle/coupled.c
+++ b/drivers/cpuidle/coupled.c
@@ -749,65 +749,52 @@ static void cpuidle_coupled_allow_idle(struct cpuidle_coupled *coupled)
put_cpu();
}
-/**
- * cpuidle_coupled_cpu_notify - notifier called during hotplug transitions
- * @nb: notifier block
- * @action: hotplug transition
- * @hcpu: target cpu number
- *
- * Called when a cpu is brought on or offline using hotplug. Updates the
- * coupled cpu set appropriately
- */
-static int cpuidle_coupled_cpu_notify(struct notifier_block *nb,
- unsigned long action, void *hcpu)
+static int coupled_cpu_online(unsigned int cpu)
{
- int cpu = (unsigned long)hcpu;
struct cpuidle_device *dev;
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_UP_PREPARE:
- case CPU_DOWN_PREPARE:
- case CPU_ONLINE:
- case CPU_DEAD:
- case CPU_UP_CANCELED:
- case CPU_DOWN_FAILED:
- break;
- default:
- return NOTIFY_OK;
- }
-
mutex_lock(&cpuidle_lock);
dev = per_cpu(cpuidle_devices, cpu);
- if (!dev || !dev->coupled)
- goto out;
-
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_UP_PREPARE:
- case CPU_DOWN_PREPARE:
- cpuidle_coupled_prevent_idle(dev->coupled);
- break;
- case CPU_ONLINE:
- case CPU_DEAD:
+ if (dev && dev->coupled) {
cpuidle_coupled_update_online_cpus(dev->coupled);
- /* Fall through */
- case CPU_UP_CANCELED:
- case CPU_DOWN_FAILED:
cpuidle_coupled_allow_idle(dev->coupled);
- break;
}
-out:
mutex_unlock(&cpuidle_lock);
- return NOTIFY_OK;
+ return 0;
}
-static struct notifier_block cpuidle_coupled_cpu_notifier = {
- .notifier_call = cpuidle_coupled_cpu_notify,
-};
+static int coupled_cpu_up_prepare(unsigned int cpu)
+{
+ struct cpuidle_device *dev;
+
+ mutex_lock(&cpuidle_lock);
+
+ dev = per_cpu(cpuidle_devices, cpu);
+ if (dev && dev->coupled)
+ cpuidle_coupled_prevent_idle(dev->coupled);
+
+ mutex_unlock(&cpuidle_lock);
+ return 0;
+}
static int __init cpuidle_coupled_init(void)
{
- return register_cpu_notifier(&cpuidle_coupled_cpu_notifier);
+ int ret;
+
+ ret = cpuhp_setup_state_nocalls(CPUHP_CPUIDLE_COUPLED_PREPARE,
+ "cpuidle/coupled:prepare",
+ coupled_cpu_up_prepare,
+ coupled_cpu_online);
+ if (ret)
+ return ret;
+ ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
+ "cpuidle/coupled:online",
+ coupled_cpu_online,
+ coupled_cpu_up_prepare);
+ if (ret < 0)
+ cpuhp_remove_state_nocalls(CPUHP_CPUIDLE_COUPLED_PREPARE);
+ return ret;
}
core_initcall(cpuidle_coupled_init);
diff --git a/drivers/cpuidle/cpuidle-arm.c b/drivers/cpuidle/cpuidle-arm.c
index 4ba3d3fe142f..f440d385ed34 100644
--- a/drivers/cpuidle/cpuidle-arm.c
+++ b/drivers/cpuidle/cpuidle-arm.c
@@ -121,6 +121,7 @@ static int __init arm_idle_init(void)
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev) {
pr_err("Failed to allocate cpuidle device\n");
+ ret = -ENOMEM;
goto out_fail;
}
dev->cpu = cpu;
diff --git a/drivers/cpuidle/cpuidle-powernv.c b/drivers/cpuidle/cpuidle-powernv.c
index f7ca891b5b59..7fe442ca38f4 100644
--- a/drivers/cpuidle/cpuidle-powernv.c
+++ b/drivers/cpuidle/cpuidle-powernv.c
@@ -119,40 +119,30 @@ static struct cpuidle_state powernv_states[CPUIDLE_STATE_MAX] = {
.enter = snooze_loop },
};
-static int powernv_cpuidle_add_cpu_notifier(struct notifier_block *n,
- unsigned long action, void *hcpu)
+static int powernv_cpuidle_cpu_online(unsigned int cpu)
{
- int hotcpu = (unsigned long)hcpu;
- struct cpuidle_device *dev =
- per_cpu(cpuidle_devices, hotcpu);
+ struct cpuidle_device *dev = per_cpu(cpuidle_devices, cpu);
if (dev && cpuidle_get_driver()) {
- switch (action) {
- case CPU_ONLINE:
- case CPU_ONLINE_FROZEN:
- cpuidle_pause_and_lock();
- cpuidle_enable_device(dev);
- cpuidle_resume_and_unlock();
- break;
+ cpuidle_pause_and_lock();
+ cpuidle_enable_device(dev);
+ cpuidle_resume_and_unlock();
+ }
+ return 0;
+}
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- cpuidle_pause_and_lock();
- cpuidle_disable_device(dev);
- cpuidle_resume_and_unlock();
- break;
+static int powernv_cpuidle_cpu_dead(unsigned int cpu)
+{
+ struct cpuidle_device *dev = per_cpu(cpuidle_devices, cpu);
- default:
- return NOTIFY_DONE;
- }
+ if (dev && cpuidle_get_driver()) {
+ cpuidle_pause_and_lock();
+ cpuidle_disable_device(dev);
+ cpuidle_resume_and_unlock();
}
- return NOTIFY_OK;
+ return 0;
}
-static struct notifier_block setup_hotplug_notifier = {
- .notifier_call = powernv_cpuidle_add_cpu_notifier,
-};
-
/*
* powernv_cpuidle_driver_init()
*/
@@ -355,7 +345,14 @@ static int __init powernv_processor_idle_init(void)
return retval;
}
- register_cpu_notifier(&setup_hotplug_notifier);
+ retval = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
+ "cpuidle/powernv:online",
+ powernv_cpuidle_cpu_online, NULL);
+ WARN_ON(retval < 0);
+ retval = cpuhp_setup_state_nocalls(CPUHP_CPUIDLE_DEAD,
+ "cpuidle/powernv:dead", NULL,
+ powernv_cpuidle_cpu_dead);
+ WARN_ON(retval < 0);
printk(KERN_DEBUG "powernv_idle_driver registered\n");
return 0;
}
diff --git a/drivers/cpuidle/cpuidle-pseries.c b/drivers/cpuidle/cpuidle-pseries.c
index 07135e009d8b..166ccd711ec9 100644
--- a/drivers/cpuidle/cpuidle-pseries.c
+++ b/drivers/cpuidle/cpuidle-pseries.c
@@ -171,40 +171,30 @@ static struct cpuidle_state shared_states[] = {
.enter = &shared_cede_loop },
};
-static int pseries_cpuidle_add_cpu_notifier(struct notifier_block *n,
- unsigned long action, void *hcpu)
+static int pseries_cpuidle_cpu_online(unsigned int cpu)
{
- int hotcpu = (unsigned long)hcpu;
- struct cpuidle_device *dev =
- per_cpu(cpuidle_devices, hotcpu);
+ struct cpuidle_device *dev = per_cpu(cpuidle_devices, cpu);
if (dev && cpuidle_get_driver()) {
- switch (action) {
- case CPU_ONLINE:
- case CPU_ONLINE_FROZEN:
- cpuidle_pause_and_lock();
- cpuidle_enable_device(dev);
- cpuidle_resume_and_unlock();
- break;
+ cpuidle_pause_and_lock();
+ cpuidle_enable_device(dev);
+ cpuidle_resume_and_unlock();
+ }
+ return 0;
+}
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- cpuidle_pause_and_lock();
- cpuidle_disable_device(dev);
- cpuidle_resume_and_unlock();
- break;
+static int pseries_cpuidle_cpu_dead(unsigned int cpu)
+{
+ struct cpuidle_device *dev = per_cpu(cpuidle_devices, cpu);
- default:
- return NOTIFY_DONE;
- }
+ if (dev && cpuidle_get_driver()) {
+ cpuidle_pause_and_lock();
+ cpuidle_disable_device(dev);
+ cpuidle_resume_and_unlock();
}
- return NOTIFY_OK;
+ return 0;
}
-static struct notifier_block setup_hotplug_notifier = {
- .notifier_call = pseries_cpuidle_add_cpu_notifier,
-};
-
/*
* pseries_cpuidle_driver_init()
*/
@@ -273,7 +263,14 @@ static int __init pseries_processor_idle_init(void)
return retval;
}
- register_cpu_notifier(&setup_hotplug_notifier);
+ retval = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
+ "cpuidle/pseries:online",
+ pseries_cpuidle_cpu_online, NULL);
+ WARN_ON(retval < 0);
+ retval = cpuhp_setup_state_nocalls(CPUHP_CPUIDLE_DEAD,
+ "cpuidle/pseries:DEAD", NULL,
+ pseries_cpuidle_cpu_dead);
+ WARN_ON(retval < 0);
printk(KERN_DEBUG "pseries_idle_driver registered\n");
return 0;
}
diff --git a/drivers/cpuidle/driver.c b/drivers/cpuidle/driver.c
index 389ade4572be..ab264d393233 100644
--- a/drivers/cpuidle/driver.c
+++ b/drivers/cpuidle/driver.c
@@ -14,6 +14,7 @@
#include <linux/cpuidle.h>
#include <linux/cpumask.h>
#include <linux/tick.h>
+#include <linux/cpu.h>
#include "cpuidle.h"
@@ -178,8 +179,8 @@ static void __cpuidle_driver_init(struct cpuidle_driver *drv)
}
#ifdef CONFIG_ARCH_HAS_CPU_RELAX
-static int poll_idle(struct cpuidle_device *dev,
- struct cpuidle_driver *drv, int index)
+static int __cpuidle poll_idle(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv, int index)
{
local_irq_enable();
if (!current_set_polling_and_test()) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 01:36:23 +0100