diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 2a306c34fda7..fc151f6a7dbd 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -8240,14 +8240,14 @@ static void setup_per_zone_lowmem_reserve(void)
 			unsigned long managed_pages = 0;
 
 			for (j = i + 1; j < MAX_NR_ZONES; j++) {
-				if (clear) {
-					zone->lowmem_reserve[j] = 0;
-				} else {
-					struct zone *upper_zone = &pgdat->node_zones[j];
+				struct zone *upper_zone = &pgdat->node_zones[j];
 
-					managed_pages += zone_managed_pages(upper_zone);
+				managed_pages += zone_managed_pages(upper_zone);
+
+				if (clear)
+					zone->lowmem_reserve[j] = 0;
+				else
 					zone->lowmem_reserve[j] = managed_pages / ratio;
-				}
 			}
 		}
 	}