--- a/usr/src/lib/libzpool/common/sys/zfs_context.h	Thu May 03 15:56:05 2012 +0200
+++ b/usr/src/lib/libzpool/common/sys/zfs_context.h	Sun May 06 18:49:02 2012 -0700
@@ -20,9 +20,8 @@
  */
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- */
-/*
  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
+ * Copyright (c) 2012 by Delphix. All rights reserved.
  */
 
 #ifndef _SYS_ZFS_CONTEXT_H
@@ -330,9 +329,12 @@
 #define	kmem_debugging()	0
 #define	kmem_cache_reap_now(_c)		/* nothing */
 #define	kmem_cache_set_move(_c, _cb)	/* nothing */
+#define	vmem_qcache_reap(_v)		/* nothing */
 #define	POINTER_INVALIDATE(_pp)		/* nothing */
 #define	POINTER_IS_VALID(_p)	0
 
+extern vmem_t *zio_arena;
+
 typedef umem_cache_t kmem_cache_t;
 
 typedef enum kmem_cbrc {