cpufreq: Move common part from governors to separate file, v2

Multiple cpufreq governers have defined similar get_cpu_idle_time_***()
routines. These routines must be moved to some common place, so that all
governors can use them.

So moving them to cpufreq_governor.c, which seems to be a better place for
keeping these routines.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
index 1bc90e1306d88e0582b76c83abf6bfe98983ea35..5b1413e4721674f0eb8666cbf915ffbf09741917 100644 (file)
--- a/drivers/cpufreq/Makefile
+++ b/drivers/cpufreq/Makefile
@@ -7,8 +7,8 @@ obj-$(CONFIG_CPU_FREQ_STAT)             += cpufreq_stats.o
 obj-$(CONFIG_CPU_FREQ_GOV_PERFORMANCE) += cpufreq_performance.o
 obj-$(CONFIG_CPU_FREQ_GOV_POWERSAVE)   += cpufreq_powersave.o
 obj-$(CONFIG_CPU_FREQ_GOV_USERSPACE)   += cpufreq_userspace.o
-obj-$(CONFIG_CPU_FREQ_GOV_ONDEMAND)    += cpufreq_ondemand.o
-obj-$(CONFIG_CPU_FREQ_GOV_CONSERVATIVE)        += cpufreq_conservative.o
+obj-$(CONFIG_CPU_FREQ_GOV_ONDEMAND)    += cpufreq_ondemand.o cpufreq_governor.o
+obj-$(CONFIG_CPU_FREQ_GOV_CONSERVATIVE)        += cpufreq_conservative.o cpufreq_governor.o
 
 # CPUfreq cross-arch helpers
 obj-$(CONFIG_CPU_FREQ_TABLE)           += freq_table.o

diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c
index a152af7e1991eff7db4dcd97c3d0d777b8812f37..181abad072667f0de1057c4eb4dd5d269c1322d8 100644 (file)
--- a/drivers/cpufreq/cpufreq_conservative.c
+++ b/drivers/cpufreq/cpufreq_conservative.c
@@ -95,40 +95,6 @@ static struct dbs_tuners {
        .freq_step = 5,
 };
 
-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 = jiffies_to_usecs(cur_wall_time);
-
-       return jiffies_to_usecs(idle_time);
-}
-
-static inline cputime64_t get_cpu_idle_time(unsigned int cpu, cputime64_t *wall)
-{
-       u64 idle_time = get_cpu_idle_time_us(cpu, NULL);
-
-       if (idle_time == -1ULL)
-               return get_cpu_idle_time_jiffy(cpu, wall);
-       else
-               idle_time += get_cpu_iowait_time_us(cpu, wall);
-
-       return idle_time;
-}
-
 /* keep track of frequency transitions */
 static int
 dbs_cpufreq_notifier(struct notifier_block *nb, unsigned long val,

diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c
new file mode 100644 (file)
index 0000000..0001071
--- /dev/null
+++ b/drivers/cpufreq/cpufreq_governor.c
@@ -0,0 +1,52 @@
+/*
+ * drivers/cpufreq/cpufreq_governor.c
+ *
+ * CPUFREQ governors common code
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <asm/cputime.h>
+#include <linux/export.h>
+#include <linux/kernel_stat.h>
+#include <linux/tick.h>
+#include <linux/types.h>
+/*
+ * Code picked from earlier governer implementations
+ */
+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 = jiffies_to_usecs(cur_wall_time);
+
+       return jiffies_to_usecs(idle_time);
+}
+
+cputime64_t get_cpu_idle_time(unsigned int cpu, cputime64_t *wall)
+{
+       u64 idle_time = get_cpu_idle_time_us(cpu, NULL);
+
+       if (idle_time == -1ULL)
+               return get_cpu_idle_time_jiffy(cpu, wall);
+       else
+               idle_time += get_cpu_iowait_time_us(cpu, wall);
+
+       return idle_time;
+}
+EXPORT_SYMBOL_GPL(get_cpu_idle_time);

diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index 396322f2a83ffc22fd6249a3133c588b195cf25b..d7f774bb49dd3f9aa699e5b328c46b5da2e828f5 100644 (file)
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -119,40 +119,6 @@ static struct dbs_tuners {
        .powersave_bias = 0,
 };
 
-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 = jiffies_to_usecs(cur_wall_time);
-
-       return jiffies_to_usecs(idle_time);
-}
-
-static inline cputime64_t get_cpu_idle_time(unsigned int cpu, cputime64_t *wall)
-{
-       u64 idle_time = get_cpu_idle_time_us(cpu, NULL);
-
-       if (idle_time == -1ULL)
-               return get_cpu_idle_time_jiffy(cpu, wall);
-       else
-               idle_time += get_cpu_iowait_time_us(cpu, wall);
-
-       return idle_time;
-}
-
 static inline cputime64_t get_cpu_iowait_time(unsigned int cpu, cputime64_t *wall)
 {
        u64 iowait_time = get_cpu_iowait_time_us(cpu, wall);

diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index fc4b78510151bb21b91c10f310b039821e2b9ba9..d03c219930524347b47d62009f2711e650f7ae47 100644 (file)
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -11,6 +11,7 @@
 #ifndef _LINUX_CPUFREQ_H
 #define _LINUX_CPUFREQ_H
 
+#include <asm/cputime.h>
 #include <linux/mutex.h>
 #include <linux/notifier.h>
 #include <linux/threads.h>
@@ -407,5 +408,9 @@ void cpufreq_frequency_table_get_attr(struct cpufreq_frequency_table *table,
 
 void cpufreq_frequency_table_put_attr(unsigned int cpu);
 
+/*********************************************************************
+ *                     Governor Helpers                                     *
+ *********************************************************************/
+cputime64_t get_cpu_idle_time(unsigned int cpu, cputime64_t *wall);
 
 #endif /* _LINUX_CPUFREQ_H */