diff --git a/include/linux/tipc.h b/include/linux/tipc.h
index 3d92396..9536d8a 100644
--- a/include/linux/tipc.h
+++ b/include/linux/tipc.h
@@ -127,23 +127,17 @@
  * TIPC topology subscription service definitions
  */
 
-#define TIPC_SUB_PORTS     	0x01  	/* filter for port availability */
-#define TIPC_SUB_SERVICE     	0x02  	/* filter for service availability */
-#define TIPC_SUB_CANCEL         0x04    /* cancel a subscription */
-#if 0
-/* The following filter options are not currently implemented */
-#define TIPC_SUB_NO_BIND_EVTS	0x04	/* filter out "publish" events */
-#define TIPC_SUB_NO_UNBIND_EVTS	0x08	/* filter out "withdraw" events */
-#define TIPC_SUB_SINGLE_EVT	0x10	/* expire after first event */
-#endif
+#define TIPC_SUB_SERVICE     	0x00  	/* Filter for service availability    */
+#define TIPC_SUB_PORTS     	0x01  	/* Filter for port availability  */
+#define TIPC_SUB_CANCEL         0x04    /* Cancel a subscription         */
 
 #define TIPC_WAIT_FOREVER	~0	/* timeout for permanent subscription */
 
 struct tipc_subscr {
-	struct tipc_name_seq seq;	/* name sequence of interest */
-	__u32 timeout;			/* subscription duration (in ms) */
-        __u32 filter;   		/* bitmask of filter options */
-	char usr_handle[8];		/* available for subscriber use */
+	struct tipc_name_seq seq;	/* NBO. Name sequence of interest */
+	__u32 timeout;			/* NBO. Subscription duration (in ms) */
+        __u32 filter;   		/* NBO. Bitmask of filter options */
+	char usr_handle[8];		/* Opaque. Available for subscriber use */
 };
 
 #define TIPC_PUBLISHED		1	/* publication event */
@@ -151,11 +145,11 @@
 #define TIPC_SUBSCR_TIMEOUT	3	/* subscription timeout event */
 
 struct tipc_event {
-	__u32 event;			/* event type */
-	__u32 found_lower;		/* matching name seq instances */
-	__u32 found_upper;		/*    "      "    "     "      */
-	struct tipc_portid port;	/* associated port */
-	struct tipc_subscr s;		/* associated subscription */
+	__u32 event;			/* NBO. Event type, as defined above */
+	__u32 found_lower;		/* NBO. Matching name seq instances  */
+	__u32 found_upper;		/*  "      "       "   "    "        */
+	struct tipc_portid port;	/* NBO. Associated port              */
+	struct tipc_subscr s;		/* Original, associated subscription */
 };
 
 /*