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cpufreq: governors: implement generic policy_is_shared 

Implement a generic helper function policy_is_shared() to replace the
current dbs_sw_coordinated_cpus() at cpufreq level, so that it can be
used by code other than cpufreq governors.

Suggested-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Fabio Baltieri 2013-01-31 09:44:40 +00:00 committed by Rafael J. Wysocki
parent 6f35a65fbb
commit 2624f90c16
7 changed files with 9 additions and 13 deletions
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2
drivers/cpufreq/acpi-cpufreq.c
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@ -734,7 +734,7 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
#ifdef CONFIG_SMP
dmi_check_system(sw_any_bug_dmi_table);
if (bios_with_sw_any_bug && cpumask_weight(policy->cpus) == 1) {
if (bios_with_sw_any_bug && !policy_is_shared(policy)) {
policy->shared_type = CPUFREQ_SHARED_TYPE_ALL;
cpumask_copy(policy->cpus, cpu_core_mask(cpu));
}

2
drivers/cpufreq/cpufreq_conservative.c
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@ -154,7 +154,7 @@ static void cs_dbs_timer(struct work_struct *work)
struct cs_cpu_dbs_info_s *dbs_info = container_of(work,
struct cs_cpu_dbs_info_s, cdbs.work.work);
if (dbs_sw_coordinated_cpus(&dbs_info->cdbs)) {
if (policy_is_shared(dbs_info->cdbs.cur_policy)) {
cs_timer_coordinated(dbs_info, dw);
} else {
mutex_lock(&dbs_info->cdbs.timer_mutex);

8
drivers/cpufreq/cpufreq_governor.c
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@ -161,14 +161,6 @@ void dbs_check_cpu(struct dbs_data *dbs_data, int cpu)
}
EXPORT_SYMBOL_GPL(dbs_check_cpu);
bool dbs_sw_coordinated_cpus(struct cpu_dbs_common_info *cdbs)
{
struct cpufreq_policy *policy = cdbs->cur_policy;
return cpumask_weight(policy->cpus) > 1;
}
EXPORT_SYMBOL_GPL(dbs_sw_coordinated_cpus);
static inline void dbs_timer_init(struct dbs_data *dbs_data, int cpu,
unsigned int sampling_rate)
{

1
drivers/cpufreq/cpufreq_governor.h
View File

@ -172,7 +172,6 @@ static inline int delay_for_sampling_rate(unsigned int sampling_rate)
u64 get_cpu_idle_time(unsigned int cpu, u64 *wall);
void dbs_check_cpu(struct dbs_data *dbs_data, int cpu);
bool dbs_sw_coordinated_cpus(struct cpu_dbs_common_info *cdbs);
int cpufreq_governor_dbs(struct dbs_data *dbs_data,
struct cpufreq_policy *policy, unsigned int event);
#endif /* _CPUFREQ_GOVERNER_H */

2
drivers/cpufreq/cpufreq_ondemand.c
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@ -277,7 +277,7 @@ static void od_dbs_timer(struct work_struct *work)
struct od_cpu_dbs_info_s *dbs_info =
container_of(work, struct od_cpu_dbs_info_s, cdbs.work.work);
if (dbs_sw_coordinated_cpus(&dbs_info->cdbs)) {
if (policy_is_shared(dbs_info->cdbs.cur_policy)) {
od_timer_coordinated(dbs_info, dw);
} else {
mutex_lock(&dbs_info->cdbs.timer_mutex);

2
drivers/cpufreq/cpufreq_stats.c
View File

@ -185,7 +185,7 @@ static void cpufreq_stats_free_table(unsigned int cpu)
static void cpufreq_stats_free_sysfs(unsigned int cpu)
{
struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
if (policy && (cpumask_weight(policy->cpus) == 1)) {
if (policy && !policy_is_shared(policy)) {
pr_debug("%s: Free sysfs stat\n", __func__);
sysfs_remove_group(&policy->kobj, &stats_attr_group);
}

5
include/linux/cpufreq.h
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@ -127,6 +127,11 @@ struct cpufreq_policy {
#define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */
#define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/
static inline bool policy_is_shared(struct cpufreq_policy *policy)
{
return cpumask_weight(policy->cpus) > 1;
}
/******************** cpufreq transition notifiers *******************/
#define CPUFREQ_PRECHANGE (0)