OS-2366 ddi_periodic_add(9F) is entirely rubbish

@@ -19,11 +19,11 @@
  * CDDL HEADER END
  */
 /*
  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2012 Joyent, Inc. All rights reserved.
+ * Copyright (c) 2013 Joyent, Inc. All rights reserved.
  */
 
 #include <mdb/mdb_param.h>
 #include <mdb/mdb_modapi.h>
 #include <mdb/mdb_ks.h>

@@ -69,10 +69,11 @@
 #include "cpupart_mdb.h"
 #include "cred.h"
 #include "ctxop.h"
 #include "cyclic.h"
 #include "damap.h"
+#include "ddi_periodic.h"
 #include "devinfo.h"
 #include "findstack.h"
 #include "fm.h"
 #include "group.h"
 #include "irm.h"

@@ -3880,10 +3881,13 @@
         { "cyctrace", "?", "dump cyclic trace buffer", cyctrace },
 
         /* from damap.c */
         { "damap", ":", "display a damap_t", damap, damap_help },
 
+        /* from ddi_periodic.c */
+        { "ddi_periodic", "?[-v]", "dump ddi_periodic_impl_t info", dprinfo },
+
         /* from devinfo.c */
         { "devbindings", "?[-qs] [device-name | major-num]",
             "print devinfo nodes bound to device-name or major-num",
             devbindings, devinfo_help },
         { "devinfo", ":[-qs]", "detailed devinfo of one node", devinfo,