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Message-id: <1387565251-7051-9-git-send-email-b.zolnierkie@samsung.com>
Date: Fri, 20 Dec 2013 19:47:30 +0100
From: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To: rjw@...ysocki.net
Cc: daniel.lezcano@...aro.org, lenb@...nel.org,
linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-samsung-soc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
kyungmin.park@...sung.com, b.zolnierkie@...sung.com
Subject: [PATCH v2 8/9] intel_idle: 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@...sung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
Cc: Len Brown <lenb@...nel.org>
---
drivers/idle/intel_idle.c | 114 ++++++++++++----------------------------------
1 file changed, 29 insertions(+), 85 deletions(-)
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 524d07b..a1a4dbd 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -93,10 +93,8 @@ struct idle_cpu {
};
static const struct idle_cpu *icpu;
-static struct cpuidle_device __percpu *intel_idle_cpuidle_devices;
static int intel_idle(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index);
-static int intel_idle_cpu_init(int cpu);
static struct cpuidle_state *cpuidle_state_table;
@@ -400,11 +398,27 @@ static void __setup_broadcast_timer(void *arg)
clockevents_notify(reason, &cpu);
}
+static void auto_demotion_disable(void *dummy)
+{
+ unsigned long long msr_bits;
+
+ rdmsrl(MSR_NHM_SNB_PKG_CST_CFG_CTL, msr_bits);
+ msr_bits &= ~(icpu->auto_demotion_disable_flags);
+ wrmsrl(MSR_NHM_SNB_PKG_CST_CFG_CTL, msr_bits);
+}
+static void c1e_promotion_disable(void *dummy)
+{
+ unsigned long long msr_bits;
+
+ rdmsrl(MSR_IA32_POWER_CTL, msr_bits);
+ msr_bits &= ~0x2;
+ wrmsrl(MSR_IA32_POWER_CTL, msr_bits);
+}
+
static int cpu_hotplug_notify(struct notifier_block *n,
unsigned long action, void *hcpu)
{
int hotcpu = (unsigned long)hcpu;
- struct cpuidle_device *dev;
switch (action & ~CPU_TASKS_FROZEN) {
case CPU_ONLINE:
@@ -416,11 +430,15 @@ static int cpu_hotplug_notify(struct notifier_block *n,
/*
* Some systems can hotplug a cpu at runtime after
* the kernel has booted, we have to initialize the
- * driver in this case
+ * hardware in this case.
*/
- dev = per_cpu_ptr(intel_idle_cpuidle_devices, hotcpu);
- if (!dev->registered)
- intel_idle_cpu_init(hotcpu);
+ if (icpu->auto_demotion_disable_flags)
+ smp_call_function_single(hotcpu, auto_demotion_disable,
+ NULL, 1);
+
+ if (icpu->disable_promotion_to_c1e)
+ smp_call_function_single(hotcpu, c1e_promotion_disable,
+ NULL, 1);
break;
}
@@ -431,23 +449,6 @@ static struct notifier_block cpu_hotplug_notifier = {
.notifier_call = cpu_hotplug_notify,
};
-static void auto_demotion_disable(void *dummy)
-{
- unsigned long long msr_bits;
-
- rdmsrl(MSR_NHM_SNB_PKG_CST_CFG_CTL, msr_bits);
- msr_bits &= ~(icpu->auto_demotion_disable_flags);
- wrmsrl(MSR_NHM_SNB_PKG_CST_CFG_CTL, msr_bits);
-}
-static void c1e_promotion_disable(void *dummy)
-{
- unsigned long long msr_bits;
-
- rdmsrl(MSR_IA32_POWER_CTL, msr_bits);
- msr_bits &= ~0x2;
- wrmsrl(MSR_IA32_POWER_CTL, msr_bits);
-}
-
static const struct idle_cpu idle_cpu_nehalem = {
.state_table = nehalem_cstates,
.auto_demotion_disable_flags = NHM_C1_AUTO_DEMOTE | NHM_C3_AUTO_DEMOTE,
@@ -560,23 +561,6 @@ static int __init intel_idle_probe(void)
}
/*
- * intel_idle_cpuidle_devices_uninit()
- * unregister, free cpuidle_devices
- */
-static void intel_idle_cpuidle_devices_uninit(void)
-{
- int i;
- struct cpuidle_device *dev;
-
- for_each_online_cpu(i) {
- dev = per_cpu_ptr(intel_idle_cpuidle_devices, i);
- cpuidle_unregister_device(dev);
- }
-
- free_percpu(intel_idle_cpuidle_devices);
- return;
-}
-/*
* intel_idle_cpuidle_driver_init()
* allocate, initialize cpuidle_states
*/
@@ -632,37 +616,9 @@ static int __init intel_idle_cpuidle_driver_init(void)
}
-/*
- * intel_idle_cpu_init()
- * allocate, initialize, register cpuidle_devices
- * @cpu: cpu/core to initialize
- */
-static int intel_idle_cpu_init(int cpu)
-{
- struct cpuidle_device *dev;
-
- dev = per_cpu_ptr(intel_idle_cpuidle_devices, cpu);
-
- dev->cpu = cpu;
-
- if (cpuidle_register_device(dev)) {
- pr_debug(PREFIX "cpuidle_register_device %d failed!\n", cpu);
- intel_idle_cpuidle_devices_uninit();
- return -EIO;
- }
-
- if (icpu->auto_demotion_disable_flags)
- smp_call_function_single(cpu, auto_demotion_disable, NULL, 1);
-
- if (icpu->disable_promotion_to_c1e)
- smp_call_function_single(cpu, c1e_promotion_disable, NULL, 1);
-
- return 0;
-}
-
static int __init intel_idle_init(void)
{
- int retval, i;
+ int retval;
/* Do not load intel_idle at all for now if idle= is passed */
if (boot_option_idle_override != IDLE_NO_OVERRIDE)
@@ -673,7 +629,8 @@ static int __init intel_idle_init(void)
return retval;
intel_idle_cpuidle_driver_init();
- retval = cpuidle_register_driver(&intel_idle_driver);
+
+ retval = cpuidle_register(&intel_idle_driver, NULL);
if (retval) {
struct cpuidle_driver *drv = cpuidle_get_driver();
printk(KERN_DEBUG PREFIX "intel_idle yielding to %s",
@@ -681,17 +638,6 @@ static int __init intel_idle_init(void)
return retval;
}
- intel_idle_cpuidle_devices = alloc_percpu(struct cpuidle_device);
- if (intel_idle_cpuidle_devices == NULL)
- return -ENOMEM;
-
- for_each_online_cpu(i) {
- retval = intel_idle_cpu_init(i);
- if (retval) {
- cpuidle_unregister_driver(&intel_idle_driver);
- return retval;
- }
- }
register_cpu_notifier(&cpu_hotplug_notifier);
return 0;
@@ -699,9 +645,7 @@ static int __init intel_idle_init(void)
static void __exit intel_idle_exit(void)
{
- intel_idle_cpuidle_devices_uninit();
- cpuidle_unregister_driver(&intel_idle_driver);
-
+ cpuidle_unregister(&intel_idle_driver);
if (lapic_timer_reliable_states != LAPIC_TIMER_ALWAYS_RELIABLE)
on_each_cpu(__setup_broadcast_timer, (void *)false, 1);
--
1.8.2.3
--
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