diff --git a/block/bfq-wf2q.c b/block/bfq-wf2q.c
index 05f0bf4a1144..ffe9ce9faa89 100644
--- a/block/bfq-wf2q.c
+++ b/block/bfq-wf2q.c
@@ -277,10 +277,7 @@ struct bfq_queue *bfq_entity_to_bfqq(struct bfq_entity *entity)
  */
 static u64 bfq_delta(unsigned long service, unsigned long weight)
 {
-	u64 d = (u64)service << WFQ_SERVICE_SHIFT;
-
-	do_div(d, weight);
-	return d;
+	return div64_ul((u64)service << WFQ_SERVICE_SHIFT, weight);
 }
 
 /**