diff --git a/mm/swapfile.c b/mm/swapfile.c
index d443dea95c27..c6c13b050a58 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -616,7 +616,7 @@ static unsigned long scan_swap_map(struct swap_info_struct *si,
 		}
 	}
 	offset = si->lowest_bit;
-	while (++offset < scan_base) {
+	while (offset < scan_base) {
 		if (!si->swap_map[offset]) {
 			spin_lock(&si->lock);
 			goto checks;
@@ -629,6 +629,7 @@ static unsigned long scan_swap_map(struct swap_info_struct *si,
 			cond_resched();
 			latency_ration = LATENCY_LIMIT;
 		}
+		offset++;
 	}
 	spin_lock(&si->lock);