diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 8c4f1b2..c1c6cb7 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1257,15 +1257,11 @@
 void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp)
 {
 	unsigned long flags;
-	int to_drain;
-	unsigned long batch;
+	int to_drain, batch;
 
 	local_irq_save(flags);
 	batch = ACCESS_ONCE(pcp->batch);
-	if (pcp->count >= batch)
-		to_drain = batch;
-	else
-		to_drain = pcp->count;
+	to_drain = min(pcp->count, batch);
 	if (to_drain > 0) {
 		free_pcppages_bulk(zone, to_drain, pcp);
 		pcp->count -= to_drain;