PM: QoS: Drop the PM_QOS_SUM QoS type

The PM_QOS_SUM QoS type is not used, so drop it along with the
code referring to it in pm_qos_get_value() and the related local
variables in there.

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

@@ -53,7 +53,6 @@ enum pm_qos_type {
 	PM_QOS_UNITIALIZED,
 	PM_QOS_MAX,		/* return the largest value */
 	PM_QOS_MIN,		/* return the smallest value */
-	PM_QOS_SUM		/* return the sum */
 };
 
 /*

kernel/power/qos.c

@@ -101,9 +101,6 @@ static const struct file_operations pm_qos_power_fops = {
 /* unlocked internal variant */
 static inline int pm_qos_get_value(struct pm_qos_constraints *c)
 {
-	struct plist_node *node;
-	int total_value = 0;
-
 	if (plist_head_empty(&c->list))
 		return c->no_constraint_value;
 
@@ -114,12 +111,6 @@ static inline int pm_qos_get_value(struct pm_qos_constraints *c)
 	case PM_QOS_MAX:
 		return plist_last(&c->list)->prio;
 
-	case PM_QOS_SUM:
-		plist_for_each(node, &c->list)
-			total_value += node->prio;
-
-		return total_value;
-
 	default:
 		/* runtime check for not using enum */
 		BUG();