linux-kernel - [RFC PATCH v2 2/3] cpufreq: export 'cpufreq_policy_list' and make macro 'for_each_*

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Date:   Mon, 18 May 2020 15:10:07 +0800
From:   Xiongfeng Wang <wangxiongfeng2@...wei.com>
To:     <rjw@...ysocki.net>, <viresh.kumar@...aro.org>,
        <Souvik.Chakravarty@....com>, <Thanu.Rangarajan@....com>
CC:     <Sudeep.Holla@....com>, <guohanjun@...wei.com>,
        <john.garry@...wei.com>, <jonathan.cameron@...wei.com>,
        <linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <wangxiongfeng2@...wei.com>
Subject: [RFC PATCH v2 2/3] cpufreq: export 'cpufreq_policy_list' and make macro 'for_each_*_policy' public

Export variable 'cpufreq_policy_list' and make macro 'for_each_*_policy"
public. This is preparation for adding SW BOOST support for CPPC.

Signed-off-by: Xiongfeng Wang <wangxiongfeng2@...wei.com>
---
 drivers/cpufreq/cpufreq.c | 16 ++--------------
 include/linux/cpufreq.h   | 14 ++++++++++++++
 2 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index bb6746e..953e163 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -30,20 +30,8 @@
 #include <linux/tick.h>
 #include <trace/events/power.h>
 
-static LIST_HEAD(cpufreq_policy_list);
-
-/* Macros to iterate over CPU policies */
-#define for_each_suitable_policy(__policy, __active)			 \
-	list_for_each_entry(__policy, &cpufreq_policy_list, policy_list) \
-		if ((__active) == !policy_is_inactive(__policy))
-
-#define for_each_active_policy(__policy)		\
-	for_each_suitable_policy(__policy, true)
-#define for_each_inactive_policy(__policy)		\
-	for_each_suitable_policy(__policy, false)
-
-#define for_each_policy(__policy)			\
-	list_for_each_entry(__policy, &cpufreq_policy_list, policy_list)
+LIST_HEAD(cpufreq_policy_list);
+EXPORT_SYMBOL_GPL(cpufreq_policy_list);
 
 /* Iterate over governors */
 static LIST_HEAD(cpufreq_governor_list);
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 018dce8..27a2a7f 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -222,6 +222,20 @@ static inline bool policy_is_shared(struct cpufreq_policy *policy)
 struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
 void cpufreq_enable_fast_switch(struct cpufreq_policy *policy);
 void cpufreq_disable_fast_switch(struct cpufreq_policy *policy);
+
+extern struct list_head cpufreq_policy_list;
+
+/* Macros to iterate over CPU policies */
+#define for_each_suitable_policy(__policy, __active)			 \
+	list_for_each_entry(__policy, &cpufreq_policy_list, policy_list) \
+		if ((__active) == !policy_is_inactive(__policy))
+#define for_each_active_policy(__policy)		\
+	for_each_suitable_policy(__policy, true)
+#define for_each_inactive_policy(__policy)		\
+	for_each_suitable_policy(__policy, false)
+#define for_each_policy(__policy)			\
+	list_for_each_entry(__policy, &cpufreq_policy_list, policy_list)
+
 #else
 static inline unsigned int cpufreq_get(unsigned int cpu)
 {
-- 
1.7.12.4