diff --git a/mm/rmap.c b/mm/rmap.c
index fede5c7..41ac397 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -149,7 +149,7 @@
 void __init anon_vma_init(void)
 {
 	anon_vma_cachep = kmem_cache_create("anon_vma", sizeof(struct anon_vma),
-			0, SLAB_DESTROY_BY_RCU|SLAB_PANIC, anon_vma_ctor, NULL);
+			0, SLAB_DESTROY_BY_RCU|SLAB_PANIC, anon_vma_ctor);
 }
 
 /*