PM: QoS: Adjust pm_qos_request() signature and reorder pm_qos.h

Change the return type of pm_qos_request() to be the same as the
one of pm_qos_read_value() called by it internally and stop exporting
it to modules (because its only caller, cpuidle, is not modular).

Also move the pm_qos_read_value() header away from the CPU latency
QoS API function headers in pm_qos.h (because it technically does
not belong to that API).

No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
Tested-by: Amit Kucheria <amit.kucheria@linaro.org>

include/linux/pm_qos.h

@@ -137,20 +137,20 @@ static inline int dev_pm_qos_request_active(struct dev_pm_qos_request *req)
 	return req->dev != NULL;
 }
 
+s32 pm_qos_read_value(struct pm_qos_constraints *c);
 int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
 			 enum pm_qos_req_action action, int value);
 bool pm_qos_update_flags(struct pm_qos_flags *pqf,
 			 struct pm_qos_flags_request *req,
 			 enum pm_qos_req_action action, s32 val);
+
 void pm_qos_add_request(struct pm_qos_request *req, int pm_qos_class,
 			s32 value);
 void pm_qos_update_request(struct pm_qos_request *req,
 			   s32 new_value);
 void pm_qos_remove_request(struct pm_qos_request *req);
-
-int pm_qos_request(int pm_qos_class);
+s32 pm_qos_request(int pm_qos_class);
 int pm_qos_request_active(struct pm_qos_request *req);
-s32 pm_qos_read_value(struct pm_qos_constraints *c);
 
 #ifdef CONFIG_PM
 enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev, s32 mask);

kernel/power/qos.c

@@ -235,11 +235,10 @@ static struct pm_qos_constraints cpu_latency_constraints = {
  *
  * This function returns the current target value.
  */
-int pm_qos_request(int pm_qos_class)
+s32 pm_qos_request(int pm_qos_class)
 {
 	return pm_qos_read_value(&cpu_latency_constraints);
 }
-EXPORT_SYMBOL_GPL(pm_qos_request);
 
 int pm_qos_request_active(struct pm_qos_request *req)
 {