diff --git a/mm/slab.h b/mm/slab.h
index 026e7c393f0b..6599f2084e80 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -338,8 +338,8 @@ static inline struct kmem_cache_node *get_node(struct kmem_cache *s, int node)
  * a kmem_cache_node structure allocated (which is true for all online nodes)
  */
 #define for_each_kmem_cache_node(__s, __node, __n) \
-	for (__node = 0; __n = get_node(__s, __node), __node < nr_node_ids; __node++) \
-		 if (__n)
+	for (__node = 0; __node < nr_node_ids; __node++) \
+		 if ((__n = get_node(__s, __node)))
 
 #endif