diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index b72da123f2420952bb8e48802cc6907bd15a5832..e969667e8d62927ea6d6457a0c5b0adaf268f345 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1519,7 +1519,7 @@ static inline void wb_dirty_limits(struct dirty_throttle_control *dtc)
 	 */
 	dtc->wb_thresh = __wb_calc_thresh(dtc);
 	dtc->wb_bg_thresh = dtc->thresh ?
-		div_u64((u64)dtc->wb_thresh * dtc->bg_thresh, dtc->thresh) : 0;
+		div64_u64(dtc->wb_thresh * dtc->bg_thresh, dtc->thresh) : 0;
 
 	/*
 	 * In order to avoid the stacked BDI deadlock we need