diff --git a/mm/swap.c b/mm/swap.c
index dbcab84c6fce..667133d25e56 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -632,7 +632,8 @@ void lru_add_drain_cpu(int cpu)
 		__pagevec_lru_add(pvec);
 
 	pvec = &per_cpu(lru_rotate.pvec, cpu);
-	if (pagevec_count(pvec)) {
+	/* Disabling interrupts below acts as a compiler barrier. */
+	if (data_race(pagevec_count(pvec))) {
 		unsigned long flags;
 
 		/* No harm done if a racing interrupt already did this */
@@ -793,7 +794,7 @@ void lru_add_drain_all(void)
 		struct work_struct *work = &per_cpu(lru_add_drain_work, cpu);
 
 		if (pagevec_count(&per_cpu(lru_pvecs.lru_add, cpu)) ||
-		    pagevec_count(&per_cpu(lru_rotate.pvec, cpu)) ||
+		    data_race(pagevec_count(&per_cpu(lru_rotate.pvec, cpu))) ||
 		    pagevec_count(&per_cpu(lru_pvecs.lru_deactivate_file, cpu)) ||
 		    pagevec_count(&per_cpu(lru_pvecs.lru_deactivate, cpu)) ||
 		    pagevec_count(&per_cpu(lru_pvecs.lru_lazyfree, cpu)) ||