diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index cfadde2fe3a2..a5d14ca13946 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1899,8 +1899,7 @@ int find_suitable_fallback(struct free_area *area, unsigned int order,
  * Reserve a pageblock for exclusive use of high-order atomic allocations if
  * there are no empty page blocks that contain a page with a suitable order
  */
-static void reserve_highatomic_pageblock(struct page *page, struct zone *zone,
-				unsigned int alloc_order)
+static void reserve_highatomic_pageblock(struct page *page, struct zone *zone)
 {
 	int mt;
 	unsigned long max_managed, flags;
@@ -3210,7 +3209,7 @@ try_this_zone:
 			 * if the pageblock should be reserved for the future
 			 */
 			if (unlikely(alloc_flags & ALLOC_HIGHATOMIC))
-				reserve_highatomic_pageblock(page, zone, order);
+				reserve_highatomic_pageblock(page, zone);
 
 			return page;
 		} else {