--- src/sys/sys/msgport2.h	2008/11/01 11:17:52	1.16
+++ src/sys/sys/msgport2.h	2008/11/09 09:20:09	1.17
@@ -100,5 +100,17 @@ lwkt_checkmsg(lwkt_msg_t msg)
     return(msg->ms_flags & MSGF_DONE);
 }
 
+static __inline
+void
+lwkt_dropmsg(lwkt_msg_t msg)
+{
+    lwkt_port_t port;
+
+    KKASSERT((msg->ms_flags & (MSGF_DROPABLE | MSGF_DONE | MSGF_QUEUED)) ==
+    	     (MSGF_DROPABLE | MSGF_QUEUED));
+    port = msg->ms_target_port;
+    port->mp_dropmsg(port, msg);
+}
+
 #endif	/* _KERNEL */
 #endif	/* _SYS_MSGPORT2_H_ */