diff --git a/mm/slob.c b/mm/slob.c
index de5d556..5bc2ceb 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -499,12 +499,12 @@
 	unsigned int size, align;
 	unsigned long flags;
 	const char *name;
-	void (*ctor)(void *, struct kmem_cache *, unsigned long);
+	void (*ctor)(struct kmem_cache *, void *);
 };
 
 struct kmem_cache *kmem_cache_create(const char *name, size_t size,
 	size_t align, unsigned long flags,
-	void (*ctor)(void*, struct kmem_cache *, unsigned long))
+	void (*ctor)(struct kmem_cache *, void *))
 {
 	struct kmem_cache *c;
 
@@ -548,7 +548,7 @@
 		b = slob_new_page(flags, get_order(c->size), node);
 
 	if (c->ctor)
-		c->ctor(b, c, 0);
+		c->ctor(c, b);
 
 	return b;
 }