Index: if.c
===================================================================
RCS file: /usr/store/mlaier/fcvs/src/sys/net/if.c,v
retrieving revision 1.201
diff -u -r1.201 if.c
--- if.c	30 Aug 2004 06:29:26 -0000	1.201
+++ if.c	31 Aug 2004 23:38:36 -0000
@@ -985,6 +985,7 @@
 {
 	struct mbuf *m, *n;
 
+	IFQ_LOCK(ifq);
 #ifdef ALTQ
 	if (ALTQ_IS_ENABLED(ifq))
 		ALTQ_PURGE(ifq);
@@ -997,6 +998,7 @@
 	ifq->ifq_head = 0;
 	ifq->ifq_tail = 0;
 	ifq->ifq_len = 0;
+	IFQ_UNLOCK(ifq);
 }
 
 /*