--- src/sys/net/if.c	2006/12/22 23:44:54	1.49
+++ src/sys/net/if.c	2007/03/24 05:57:49	1.50
@@ -978,6 +978,16 @@ if_up(struct ifnet *ifp)
 }
 
 /*
+ * Process a link state change.
+ * NOTE: must be called at splsoftnet or equivalent.
+ */
+void
+if_link_state_change(struct ifnet *ifp)
+{
+	rt_ifmsg(ifp);
+}
+
+/*
  * Handle interface watchdog timer routines.  Called
  * from softclock, we decrement timers (if set) and
  * call the appropriate interface routine on expiration.