diff -u linux-2.6.1.orig/net/decnet/dn_route.c linux-2.6.1/net/decnet/dn_route.c
--- linux-2.6.1.orig/net/decnet/dn_route.c	2003-12-18 02:59:42.000000000 +0000
+++ linux-2.6.1/net/decnet/dn_route.c	2004-01-31 11:34:38.000000000 +0000
@@ -1720,7 +1720,8 @@
 
 static void dn_rt_cache_seq_stop(struct seq_file *seq, void *v)
 {
-	rcu_read_unlock();
+	if (v)
+		rcu_read_unlock();
 }
 
 static int dn_rt_cache_seq_show(struct seq_file *seq, void *v)