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Commit 72a4ce34 authored by Viresh Kumar's avatar Viresh Kumar Committed by Rafael J. Wysocki
Browse files

cpufreq: Move get_cpu_idle_time() to cpufreq.c 



Governors other than ondemand and conservative can also use
get_cpu_idle_time() and they aren't required to compile
cpufreq_governor.c. So, move these independent routines to
cpufreq.c instead.

Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 944e9a03

drivers/cpufreq/cpufreq.c

+38 −0
Original line number Diff line number Diff line
@@ -17,7 +17,9 @@ 


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt



#include <asm/cputime.h>

#include <linux/kernel.h>

#include <linux/kernel_stat.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/notifier.h>
@@ -25,6 +27,7 @@ 
#include <linux/delay.h>

#include <linux/interrupt.h>

#include <linux/spinlock.h>

#include <linux/tick.h>

#include <linux/device.h>

#include <linux/slab.h>

#include <linux/cpu.h>
@@ -143,6 +146,41 @@ struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy) 
}

EXPORT_SYMBOL_GPL(get_governor_parent_kobj);



static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall)

{

	u64 idle_time;

	u64 cur_wall_time;

	u64 busy_time;



	cur_wall_time = jiffies64_to_cputime64(get_jiffies_64());



	busy_time = kcpustat_cpu(cpu).cpustat[CPUTIME_USER];

	busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SYSTEM];

	busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_IRQ];

	busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SOFTIRQ];

	busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_STEAL];

	busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_NICE];



	idle_time = cur_wall_time - busy_time;

	if (wall)

		*wall = cputime_to_usecs(cur_wall_time);



	return cputime_to_usecs(idle_time);

}



u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy)

{

	u64 idle_time = get_cpu_idle_time_us(cpu, io_busy ? wall : NULL);



	if (idle_time == -1ULL)

		return get_cpu_idle_time_jiffy(cpu, wall);

	else if (!io_busy)

		idle_time += get_cpu_iowait_time_us(cpu, wall);



	return idle_time;

}

EXPORT_SYMBOL_GPL(get_cpu_idle_time);



static struct cpufreq_policy *__cpufreq_cpu_get(unsigned int cpu, bool sysfs)

{

	struct cpufreq_policy *data;

drivers/cpufreq/cpufreq_governor.c

+0 −36
Original line number Diff line number Diff line
@@ -23,7 +23,6 @@ 
#include <linux/kernel_stat.h>

#include <linux/mutex.h>

#include <linux/slab.h>

#include <linux/tick.h>

#include <linux/types.h>

#include <linux/workqueue.h>
@@ -37,41 +36,6 @@ static struct attribute_group *get_sysfs_attr(struct dbs_data *dbs_data) 
		return dbs_data->cdata->attr_group_gov_sys;

}



static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall)

{

	u64 idle_time;

	u64 cur_wall_time;

	u64 busy_time;



	cur_wall_time = jiffies64_to_cputime64(get_jiffies_64());



	busy_time = kcpustat_cpu(cpu).cpustat[CPUTIME_USER];

	busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SYSTEM];

	busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_IRQ];

	busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SOFTIRQ];

	busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_STEAL];

	busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_NICE];



	idle_time = cur_wall_time - busy_time;

	if (wall)

		*wall = cputime_to_usecs(cur_wall_time);



	return cputime_to_usecs(idle_time);

}



u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy)

{

	u64 idle_time = get_cpu_idle_time_us(cpu, io_busy ? wall : NULL);



	if (idle_time == -1ULL)

		return get_cpu_idle_time_jiffy(cpu, wall);

	else if (!io_busy)

		idle_time += get_cpu_iowait_time_us(cpu, wall);



	return idle_time;

}

EXPORT_SYMBOL_GPL(get_cpu_idle_time);



void dbs_check_cpu(struct dbs_data *dbs_data, int cpu)

{

	struct cpu_dbs_common_info *cdbs = dbs_data->cdata->get_cpu_cdbs(cpu);

drivers/cpufreq/cpufreq_governor.h

+0 −1
Original line number Diff line number Diff line
@@ -256,7 +256,6 @@ static ssize_t show_sampling_rate_min_gov_pol \ 
	return sprintf(buf, "%u\n", dbs_data->min_sampling_rate);	\

}



u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy);

void dbs_check_cpu(struct dbs_data *dbs_data, int cpu);

bool need_load_eval(struct cpu_dbs_common_info *cdbs,

		unsigned int sampling_rate);

include/linux/cpufreq.h

+1 −0
Original line number Diff line number Diff line
@@ -337,6 +337,7 @@ const char *cpufreq_get_current_driver(void); 
/*********************************************************************

 *                        CPUFREQ 2.6. INTERFACE                     *

 *********************************************************************/

u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy);

int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);

int cpufreq_update_policy(unsigned int cpu);

bool have_governor_per_policy(void);