Ignore the module unload thread.

sys/rump/librump/rumpkern/emul.c

@@ -1,4 +1,4 @@
-/*	$NetBSD: emul.c,v 1.53 2008/10/14 10:42:27 pooka Exp $	*/
+/*	$NetBSD: emul.c,v 1.54 2008/11/17 08:41:28 pooka Exp $	*/
 
 /*
  * Copyright (c) 2007 Antti Kantee.  All Rights Reserved.
@@ -412,6 +412,11 @@ kthread_create(pri_t pri, int flags, struct cpu_info *ci,
 	struct lwp *l;
 	int rv;
 
+	/* we don't want a module unload thread */
+	if (strcmp(fmt, "modunload") == 0) {
+		return 0;
+	}
+
 	if (!rump_threads) {
 		/* fake them */
 		if (strcmp(fmt, "vrele") == 0) {