--- a/usr/src/uts/common/fs/zfs/sys/zio.h	Mon May 16 00:20:30 2011 +0100
+++ b/usr/src/uts/common/fs/zfs/sys/zio.h	Wed Jul 27 07:13:44 2011 -0700
@@ -22,6 +22,9 @@
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  */
+/*
+ * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
+ */
 
 #ifndef _ZIO_H
 #define	_ZIO_H
@@ -417,6 +420,9 @@
 	/* FMA state */
 	zio_cksum_report_t *io_cksum_report;
 	uint64_t	io_ena;
+
+	/* Taskq dispatching state */
+	taskq_ent_t	io_tqent;
 };
 
 extern zio_t *zio_null(zio_t *pio, spa_t *spa, vdev_t *vd,