mm: Remove slab destructors from kmem_cache_create().

Slab destructors were no longer supported after Christoph's
c59def9f22 change. They've been
BUGs for both slab and slub, and slob never supported them
either.

This rips out support for the dtor pointer from kmem_cache_create()
completely and fixes up every single callsite in the kernel (there were
about 224, not including the slab allocator definitions themselves,
or the documentation references).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

fs/efs/super.c

@@ -75,13 +75,13 @@ static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flag
 
 	inode_init_once(&ei->vfs_inode);
 }
- 
+
 static int init_inodecache(void)
 {
 	efs_inode_cachep = kmem_cache_create("efs_inode_cache",
 				sizeof(struct efs_inode_info),
 				0, SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD,
-				init_once, NULL);
+				init_once);
 	if (efs_inode_cachep == NULL)
 		return -ENOMEM;
 	return 0;