blk-throttle: relocate throtl_schedule_delayed_work()

Move throtl_schedule_delayed_work() above its first user so that the
forward declaration can be removed.

This patch is pure relocaiton.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Vivek Goyal <vgoyal@redhat.com>

block/blk-throttle.c

@@ -25,8 +25,6 @@ static struct blkcg_policy blkcg_policy_throtl;
 
 /* A workqueue to queue throttle related work */
 static struct workqueue_struct *kthrotld_workqueue;
-static void throtl_schedule_delayed_work(struct throtl_data *td,
-				unsigned long delay);
 
 struct throtl_rb_root {
 	struct rb_root rb;
@@ -398,6 +396,19 @@ static void throtl_dequeue_tg(struct throtl_data *td, struct throtl_grp *tg)
 		__throtl_dequeue_tg(td, tg);
 }
 
+/* Call with queue lock held */
+static void throtl_schedule_delayed_work(struct throtl_data *td,
+					 unsigned long delay)
+{
+	struct delayed_work *dwork = &td->dispatch_work;
+
+	if (total_nr_queued(td)) {
+		mod_delayed_work(kthrotld_workqueue, dwork, delay);
+		throtl_log(td, "schedule work. delay=%lu jiffies=%lu",
+			   delay, jiffies);
+	}
+}
+
 static void throtl_schedule_next_dispatch(struct throtl_data *td)
 {
 	struct throtl_rb_root *st = &td->tg_service_tree;
@@ -863,20 +874,6 @@ void blk_throtl_dispatch_work_fn(struct work_struct *work)
 	}
 }
 
-/* Call with queue lock held */
-static void
-throtl_schedule_delayed_work(struct throtl_data *td, unsigned long delay)
-{
-
-	struct delayed_work *dwork = &td->dispatch_work;
-
-	if (total_nr_queued(td)) {
-		mod_delayed_work(kthrotld_workqueue, dwork, delay);
-		throtl_log(td, "schedule work. delay=%lu jiffies=%lu",
-				delay, jiffies);
-	}
-}
-
 static u64 tg_prfill_cpu_rwstat(struct seq_file *sf,
 				struct blkg_policy_data *pd, int off)
 {