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cpufreq: interactive: use idle notifier

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Convert interactive governor to use idle notifier instead of
hooking pm_idle directly.

Change-Id: I47e007f330468ac559240a0ae8a3cb06a89ccb67
Signed-off-by: Allen Martin <amartin@nvidia.com>
This commit is contained in:
Allen Martin
2011-06-28 09:58:39 -07:00
committed by Todd Poynor
parent 13b2b14fd6
commit 80e65d97d2
1 changed files with 30 additions and 7 deletions
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37
drivers/cpufreq/cpufreq_interactive.c
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@@ -28,7 +28,6 @@
#include <asm/cputime.h>
static void (*pm_idle_old)(void);
static atomic_t active_count = ATOMIC_INIT(0);
struct cpufreq_interactive_cpuinfo {
@@ -227,14 +226,13 @@ exit:
return;
}
static void cpufreq_interactive_idle(void)
static void cpufreq_interactive_idle_start(void)
{
struct cpufreq_interactive_cpuinfo *pcpu =
&per_cpu(cpuinfo, smp_processor_id());
int pending;
if (!pcpu->governor_enabled) {
pm_idle_old();
return;
}
@@ -278,7 +276,13 @@ static void cpufreq_interactive_idle(void)
}
}
pm_idle_old();
}
static void cpufreq_interactive_idle_end(void)
{
struct cpufreq_interactive_cpuinfo *pcpu =
&per_cpu(cpuinfo, smp_processor_id());
pcpu->idling = 0;
smp_wmb();
@@ -462,8 +466,6 @@ static int cpufreq_governor_interactive(struct cpufreq_policy *policy,
if (rc)
return rc;
pm_idle_old = pm_idle;
pm_idle = cpufreq_interactive_idle;
break;
case CPUFREQ_GOV_STOP:
@@ -489,7 +491,6 @@ static int cpufreq_governor_interactive(struct cpufreq_policy *policy,
sysfs_remove_group(cpufreq_global_kobject,
&interactive_attr_group);
pm_idle = pm_idle_old;
break;
case CPUFREQ_GOV_LIMITS:
@@ -504,6 +505,26 @@ static int cpufreq_governor_interactive(struct cpufreq_policy *policy,
return 0;
}
static int cpufreq_interactive_idle_notifier(struct notifier_block *nb,
unsigned long val,
void *data)
{
switch (val) {
case IDLE_START:
cpufreq_interactive_idle_start();
break;
case IDLE_END:
cpufreq_interactive_idle_end();
break;
}
return 0;
}
static struct notifier_block cpufreq_interactive_idle_nb = {
.notifier_call = cpufreq_interactive_idle_notifier,
};
static int __init cpufreq_interactive_init(void)
{
unsigned int i;
@@ -542,6 +563,8 @@ static int __init cpufreq_interactive_init(void)
spin_lock_init(&up_cpumask_lock);
spin_lock_init(&down_cpumask_lock);
idle_notifier_register(&cpufreq_interactive_idle_nb);
return cpufreq_register_governor(&cpufreq_gov_interactive);
err_freeuptask: