cpufreq: governor: Move abstract gov_attr_set code to seperate file

Move abstract code related to struct gov_attr_set to a separate (new)
file so it can be shared with (future) goverernors that won't share
more code with "ondemand" and "conservative".

No intentional functional changes.

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

5 files changed, 95 insertions, 82 deletions

diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
index a7f45853c103..7fd87106ba46 100644
--- a/drivers/cpufreq/Kconfig
+++ b/drivers/cpufreq/Kconfig
@@ -18,7 +18,11 @@ config CPU_FREQ
 
 if CPU_FREQ
 
+config CPU_FREQ_GOV_ATTR_SET
+        bool
+
 config CPU_FREQ_GOV_COMMON
+        select CPU_FREQ_GOV_ATTR_SET
         select IRQ_WORK
         bool
 
diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
index 9e63fb1b09f8..6d1186701a9c 100644
--- a/drivers/cpufreq/Makefile
+++ b/drivers/cpufreq/Makefile
@@ -11,6 +11,7 @@ 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_COMMON)               += cpufreq_governor.o
+obj-$(CONFIG_CPU_FREQ_GOV_ATTR_SET)     += cpufreq_governor_attr_set.o
 
 obj-$(CONFIG_CPUFREQ_DT)                += cpufreq-dt.o
 
diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c
index 6a565e248ad3..20f0a4e114d1 100644
--- a/drivers/cpufreq/cpufreq_governor.c
+++ b/drivers/cpufreq/cpufreq_governor.c
@@ -112,53 +112,6 @@ void gov_update_cpu_data(struct dbs_data *dbs_data)
 }
 EXPORT_SYMBOL_GPL(gov_update_cpu_data);
 
-static inline struct gov_attr_set *to_gov_attr_set(struct kobject *kobj)
-{
-        return container_of(kobj, struct gov_attr_set, kobj);
-}
-
-static inline struct governor_attr *to_gov_attr(struct attribute *attr)
-{
-        return container_of(attr, struct governor_attr, attr);
-}
-
-static ssize_t governor_show(struct kobject *kobj, struct attribute *attr,
-                             char *buf)
-{
-        struct governor_attr *gattr = to_gov_attr(attr);
-
-        return gattr->show(to_gov_attr_set(kobj), buf);
-}
-
-static ssize_t governor_store(struct kobject *kobj, struct attribute *attr,
-                              const char *buf, size_t count)
-{
-        struct gov_attr_set *attr_set = to_gov_attr_set(kobj);
-        struct governor_attr *gattr = to_gov_attr(attr);
-        int ret = -EBUSY;
-
-        mutex_lock(&attr_set->update_lock);
-
-        if (attr_set->usage_count)
-                ret = gattr->store(attr_set, buf, count);
-
-        mutex_unlock(&attr_set->update_lock);
-
-        return ret;
-}
-
-/*
- * Sysfs Ops for accessing governor attributes.
- *
- * All show/store invocations for governor specific sysfs attributes, will first
- * call the below show/store callbacks and the attribute specific callback will
- * be called from within it.
- */
-static const struct sysfs_ops governor_sysfs_ops = {
-        .show   = governor_show,
-        .store  = governor_store,
-};
-
 unsigned int dbs_update(struct cpufreq_policy *policy)
 {
         struct policy_dbs_info *policy_dbs = policy->governor_data;
@@ -425,41 +378,6 @@ static void free_policy_dbs_info(struct policy_dbs_info *policy_dbs,
         gov->free(policy_dbs);
 }
 
-static void gov_attr_set_init(struct gov_attr_set *attr_set,
-                              struct list_head *list_node)
-{
-        INIT_LIST_HEAD(&attr_set->policy_list);
-        mutex_init(&attr_set->update_lock);
-        attr_set->usage_count = 1;
-        list_add(list_node, &attr_set->policy_list);
-}
-
-static void gov_attr_set_get(struct gov_attr_set *attr_set,
-                             struct list_head *list_node)
-{
-        mutex_lock(&attr_set->update_lock);
-        attr_set->usage_count++;
-        list_add(list_node, &attr_set->policy_list);
-        mutex_unlock(&attr_set->update_lock);
-}
-
-static unsigned int gov_attr_set_put(struct gov_attr_set *attr_set,
-                                     struct list_head *list_node)
-{
-        unsigned int count;
-
-        mutex_lock(&attr_set->update_lock);
-        list_del(list_node);
-        count = --attr_set->usage_count;
-        mutex_unlock(&attr_set->update_lock);
-        if (count)
-                return count;
-
-        kobject_put(&attr_set->kobj);
-        mutex_destroy(&attr_set->update_lock);
-        return 0;
-}
-
 static int cpufreq_governor_init(struct cpufreq_policy *policy)
 {
         struct dbs_governor *gov = dbs_governor_of(policy);
diff --git a/drivers/cpufreq/cpufreq_governor.h b/drivers/cpufreq/cpufreq_governor.h
index f4ad431130b8..ccdd0814efbc 100644
--- a/drivers/cpufreq/cpufreq_governor.h
+++ b/drivers/cpufreq/cpufreq_governor.h
@@ -48,6 +48,12 @@ struct gov_attr_set {
         int usage_count;
 };
 
+extern const struct sysfs_ops governor_sysfs_ops;
+
+void gov_attr_set_init(struct gov_attr_set *attr_set, struct list_head *list_node);
+void gov_attr_set_get(struct gov_attr_set *attr_set, struct list_head *list_node);
+unsigned int gov_attr_set_put(struct gov_attr_set *attr_set, struct list_head *list_node);
+
 /*
  * Abbreviations:
  * dbs: used as a shortform for demand based switching It helps to keep variable
diff --git a/drivers/cpufreq/cpufreq_governor_attr_set.c b/drivers/cpufreq/cpufreq_governor_attr_set.c
new file mode 100644
index 000000000000..52841f807a7e
--- /dev/null
+++ b/drivers/cpufreq/cpufreq_governor_attr_set.c
@@ -0,0 +1,84 @@
+/*
+ * Abstract code for CPUFreq governor tunable sysfs attributes.
+ *
+ * Copyright (C) 2016, Intel Corporation
+ * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
+ *
+ * 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 "cpufreq_governor.h"
+
+static inline struct gov_attr_set *to_gov_attr_set(struct kobject *kobj)
+{
+        return container_of(kobj, struct gov_attr_set, kobj);
+}
+
+static inline struct governor_attr *to_gov_attr(struct attribute *attr)
+{
+        return container_of(attr, struct governor_attr, attr);
+}
+
+static ssize_t governor_show(struct kobject *kobj, struct attribute *attr,
+                             char *buf)
+{
+        struct governor_attr *gattr = to_gov_attr(attr);
+
+        return gattr->show(to_gov_attr_set(kobj), buf);
+}
+
+static ssize_t governor_store(struct kobject *kobj, struct attribute *attr,
+                              const char *buf, size_t count)
+{
+        struct gov_attr_set *attr_set = to_gov_attr_set(kobj);
+        struct governor_attr *gattr = to_gov_attr(attr);
+        int ret;
+
+        mutex_lock(&attr_set->update_lock);
+        ret = attr_set->usage_count ? gattr->store(attr_set, buf, count) : -EBUSY;
+        mutex_unlock(&attr_set->update_lock);
+        return ret;
+}
+
+const struct sysfs_ops governor_sysfs_ops = {
+        .show   = governor_show,
+        .store  = governor_store,
+};
+EXPORT_SYMBOL_GPL(governor_sysfs_ops);
+
+void gov_attr_set_init(struct gov_attr_set *attr_set, struct list_head *list_node)
+{
+        INIT_LIST_HEAD(&attr_set->policy_list);
+        mutex_init(&attr_set->update_lock);
+        attr_set->usage_count = 1;
+        list_add(list_node, &attr_set->policy_list);
+}
+EXPORT_SYMBOL_GPL(gov_attr_set_init);
+
+void gov_attr_set_get(struct gov_attr_set *attr_set, struct list_head *list_node)
+{
+        mutex_lock(&attr_set->update_lock);
+        attr_set->usage_count++;
+        list_add(list_node, &attr_set->policy_list);
+        mutex_unlock(&attr_set->update_lock);
+}
+EXPORT_SYMBOL_GPL(gov_attr_set_get);
+
+unsigned int gov_attr_set_put(struct gov_attr_set *attr_set, struct list_head *list_node)
+{
+        unsigned int count;
+
+        mutex_lock(&attr_set->update_lock);
+        list_del(list_node);
+        count = --attr_set->usage_count;
+        mutex_unlock(&attr_set->update_lock);
+        if (count)
+                return count;
+
+        kobject_put(&attr_set->kobj);
+        mutex_destroy(&attr_set->update_lock);
+        return 0;
+}
+EXPORT_SYMBOL_GPL(gov_attr_set_put);