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-rw-r--r--drivers/cpufreq/Kconfig1
-rw-r--r--drivers/cpufreq/cpufreq.c34
-rw-r--r--drivers/cpufreq/cpufreq_conservative.c7
-rw-r--r--drivers/cpufreq/cpufreq_ondemand.c28
4 files changed, 41 insertions, 29 deletions
diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
index 2cc71b6..491779a 100644
--- a/drivers/cpufreq/Kconfig
+++ b/drivers/cpufreq/Kconfig
@@ -107,6 +107,7 @@ config CPU_FREQ_GOV_USERSPACE
config CPU_FREQ_GOV_ONDEMAND
tristate "'ondemand' cpufreq policy governor"
+ select CPU_FREQ_TABLE
help
'ondemand' - This driver adds a dynamic cpufreq policy governor.
The governor does a periodic polling and
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index d35a9f0..47ab42d 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -42,7 +42,7 @@ static DEFINE_SPINLOCK(cpufreq_driver_lock);
/* internal prototypes */
static int __cpufreq_governor(struct cpufreq_policy *policy, unsigned int event);
-static void handle_update(void *data);
+static void handle_update(struct work_struct *work);
/**
* Two notifier lists: the "policy" list is involved in the
@@ -52,8 +52,14 @@ static void handle_update(void *data);
* The mutex locks both lists.
*/
static BLOCKING_NOTIFIER_HEAD(cpufreq_policy_notifier_list);
-static BLOCKING_NOTIFIER_HEAD(cpufreq_transition_notifier_list);
+static struct srcu_notifier_head cpufreq_transition_notifier_list;
+static int __init init_cpufreq_transition_notifier_list(void)
+{
+ srcu_init_notifier_head(&cpufreq_transition_notifier_list);
+ return 0;
+}
+pure_initcall(init_cpufreq_transition_notifier_list);
static LIST_HEAD(cpufreq_governor_list);
static DEFINE_MUTEX (cpufreq_governor_mutex);
@@ -262,14 +268,14 @@ void cpufreq_notify_transition(struct cpufreq_freqs *freqs, unsigned int state)
freqs->old = policy->cur;
}
}
- blocking_notifier_call_chain(&cpufreq_transition_notifier_list,
+ srcu_notifier_call_chain(&cpufreq_transition_notifier_list,
CPUFREQ_PRECHANGE, freqs);
adjust_jiffies(CPUFREQ_PRECHANGE, freqs);
break;
case CPUFREQ_POSTCHANGE:
adjust_jiffies(CPUFREQ_POSTCHANGE, freqs);
- blocking_notifier_call_chain(&cpufreq_transition_notifier_list,
+ srcu_notifier_call_chain(&cpufreq_transition_notifier_list,
CPUFREQ_POSTCHANGE, freqs);
if (likely(policy) && likely(policy->cpu == freqs->cpu))
policy->cur = freqs->new;
@@ -659,7 +665,7 @@ static int cpufreq_add_dev (struct sys_device * sys_dev)
mutex_init(&policy->lock);
mutex_lock(&policy->lock);
init_completion(&policy->kobj_unregister);
- INIT_WORK(&policy->update, handle_update, (void *)(long)cpu);
+ INIT_WORK(&policy->update, handle_update);
/* call driver. From then on the cpufreq must be able
* to accept all calls to ->verify and ->setpolicy for this CPU
@@ -889,9 +895,11 @@ static int cpufreq_remove_dev (struct sys_device * sys_dev)
}
-static void handle_update(void *data)
+static void handle_update(struct work_struct *work)
{
- unsigned int cpu = (unsigned int)(long)data;
+ struct cpufreq_policy *policy =
+ container_of(work, struct cpufreq_policy, update);
+ unsigned int cpu = policy->cpu;
dprintk("handle_update for cpu %u called\n", cpu);
cpufreq_update_policy(cpu);
}
@@ -994,7 +1002,7 @@ static int cpufreq_suspend(struct sys_device * sysdev, pm_message_t pmsg)
unsigned int cur_freq = 0;
struct cpufreq_policy *cpu_policy;
- dprintk("resuming cpu %u\n", cpu);
+ dprintk("suspending cpu %u\n", cpu);
if (!cpu_online(cpu))
return 0;
@@ -1049,7 +1057,7 @@ static int cpufreq_suspend(struct sys_device * sysdev, pm_message_t pmsg)
freqs.old = cpu_policy->cur;
freqs.new = cur_freq;
- blocking_notifier_call_chain(&cpufreq_transition_notifier_list,
+ srcu_notifier_call_chain(&cpufreq_transition_notifier_list,
CPUFREQ_SUSPENDCHANGE, &freqs);
adjust_jiffies(CPUFREQ_SUSPENDCHANGE, &freqs);
@@ -1130,7 +1138,7 @@ static int cpufreq_resume(struct sys_device * sysdev)
freqs.old = cpu_policy->cur;
freqs.new = cur_freq;
- blocking_notifier_call_chain(
+ srcu_notifier_call_chain(
&cpufreq_transition_notifier_list,
CPUFREQ_RESUMECHANGE, &freqs);
adjust_jiffies(CPUFREQ_RESUMECHANGE, &freqs);
@@ -1176,7 +1184,7 @@ int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list)
switch (list) {
case CPUFREQ_TRANSITION_NOTIFIER:
- ret = blocking_notifier_chain_register(
+ ret = srcu_notifier_chain_register(
&cpufreq_transition_notifier_list, nb);
break;
case CPUFREQ_POLICY_NOTIFIER:
@@ -1208,7 +1216,7 @@ int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list)
switch (list) {
case CPUFREQ_TRANSITION_NOTIFIER:
- ret = blocking_notifier_chain_unregister(
+ ret = srcu_notifier_chain_unregister(
&cpufreq_transition_notifier_list, nb);
break;
case CPUFREQ_POLICY_NOTIFIER:
@@ -1529,7 +1537,6 @@ int cpufreq_update_policy(unsigned int cpu)
}
EXPORT_SYMBOL(cpufreq_update_policy);
-#ifdef CONFIG_HOTPLUG_CPU
static int cpufreq_cpu_callback(struct notifier_block *nfb,
unsigned long action, void *hcpu)
{
@@ -1569,7 +1576,6 @@ static struct notifier_block __cpuinitdata cpufreq_cpu_notifier =
{
.notifier_call = cpufreq_cpu_callback,
};
-#endif /* CONFIG_HOTPLUG_CPU */
/*********************************************************************
* REGISTER / UNREGISTER CPUFREQ DRIVER *
diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c
index c4c578d..5ef5ede 100644
--- a/drivers/cpufreq/cpufreq_conservative.c
+++ b/drivers/cpufreq/cpufreq_conservative.c
@@ -59,7 +59,7 @@ static unsigned int def_sampling_rate;
#define MAX_SAMPLING_DOWN_FACTOR (10)
#define TRANSITION_LATENCY_LIMIT (10 * 1000)
-static void do_dbs_timer(void *data);
+static void do_dbs_timer(struct work_struct *work);
struct cpu_dbs_info_s {
struct cpufreq_policy *cur_policy;
@@ -82,7 +82,7 @@ static unsigned int dbs_enable; /* number of CPUs using this policy */
* is recursive for the same process. -Venki
*/
static DEFINE_MUTEX (dbs_mutex);
-static DECLARE_WORK (dbs_work, do_dbs_timer, NULL);
+static DECLARE_DELAYED_WORK(dbs_work, do_dbs_timer);
struct dbs_tuners {
unsigned int sampling_rate;
@@ -420,7 +420,7 @@ static void dbs_check_cpu(int cpu)
}
}
-static void do_dbs_timer(void *data)
+static void do_dbs_timer(struct work_struct *work)
{
int i;
lock_cpu_hotplug();
@@ -435,7 +435,6 @@ static void do_dbs_timer(void *data)
static inline void dbs_timer_init(void)
{
- INIT_WORK(&dbs_work, do_dbs_timer, NULL);
schedule_delayed_work(&dbs_work,
usecs_to_jiffies(dbs_tuners_ins.sampling_rate));
return;
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index bf8aa45..e1cc511 100644
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -47,13 +47,17 @@ static unsigned int def_sampling_rate;
#define DEF_SAMPLING_RATE_LATENCY_MULTIPLIER (1000)
#define TRANSITION_LATENCY_LIMIT (10 * 1000)
-static void do_dbs_timer(void *data);
+static void do_dbs_timer(struct work_struct *work);
+
+/* Sampling types */
+enum dbs_sample {DBS_NORMAL_SAMPLE, DBS_SUB_SAMPLE};
struct cpu_dbs_info_s {
cputime64_t prev_cpu_idle;
cputime64_t prev_cpu_wall;
struct cpufreq_policy *cur_policy;
- struct work_struct work;
+ struct delayed_work work;
+ enum dbs_sample sample_type;
unsigned int enable;
struct cpufreq_frequency_table *freq_table;
unsigned int freq_lo;
@@ -407,30 +411,31 @@ static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info)
}
}
-/* Sampling types */
-enum {DBS_NORMAL_SAMPLE, DBS_SUB_SAMPLE};
-
-static void do_dbs_timer(void *data)
+static void do_dbs_timer(struct work_struct *work)
{
unsigned int cpu = smp_processor_id();
struct cpu_dbs_info_s *dbs_info = &per_cpu(cpu_dbs_info, cpu);
+ enum dbs_sample sample_type = dbs_info->sample_type;
/* We want all CPUs to do sampling nearly on same jiffy */
int delay = usecs_to_jiffies(dbs_tuners_ins.sampling_rate);
+
+ /* Permit rescheduling of this work item */
+ work_release(work);
+
delay -= jiffies % delay;
if (!dbs_info->enable)
return;
/* Common NORMAL_SAMPLE setup */
- INIT_WORK(&dbs_info->work, do_dbs_timer, (void *)DBS_NORMAL_SAMPLE);
+ dbs_info->sample_type = DBS_NORMAL_SAMPLE;
if (!dbs_tuners_ins.powersave_bias ||
- (unsigned long) data == DBS_NORMAL_SAMPLE) {
+ sample_type == DBS_NORMAL_SAMPLE) {
lock_cpu_hotplug();
dbs_check_cpu(dbs_info);
unlock_cpu_hotplug();
if (dbs_info->freq_lo) {
/* Setup timer for SUB_SAMPLE */
- INIT_WORK(&dbs_info->work, do_dbs_timer,
- (void *)DBS_SUB_SAMPLE);
+ dbs_info->sample_type = DBS_SUB_SAMPLE;
delay = dbs_info->freq_hi_jiffies;
}
} else {
@@ -449,7 +454,8 @@ static inline void dbs_timer_init(unsigned int cpu)
delay -= jiffies % delay;
ondemand_powersave_bias_init();
- INIT_WORK(&dbs_info->work, do_dbs_timer, NULL);
+ INIT_DELAYED_WORK_NAR(&dbs_info->work, do_dbs_timer);
+ dbs_info->sample_type = DBS_NORMAL_SAMPLE;
queue_delayed_work_on(cpu, kondemand_wq, &dbs_info->work, delay);
}
generated by cgit v0.10.2 at 2024-09-19 22:22:11 (GMT)