From 07216d15fc49d96eb42a634934ce48232ef57c1a Mon Sep 17 00:00:00 2001
From: thorpej <thorpej@NetBSD.org>
Date: Tue, 6 Jan 1998 21:15:41 +0000
Subject: [PATCH] Allow retval to be NULL, filling it in only if it was passed.

---
 sys/kern/kern_fork.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/sys/kern/kern_fork.c b/sys/kern/kern_fork.c
index e9039d5bf8d7..e1a37eb6133a 100644
--- a/sys/kern/kern_fork.c
+++ b/sys/kern/kern_fork.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: kern_fork.c,v 1.35 1998/01/05 05:16:28 thorpej Exp $	*/
+/*	$NetBSD: kern_fork.c,v 1.36 1998/01/06 21:15:41 thorpej Exp $	*/
 
 /*
  * Copyright (c) 1982, 1986, 1989, 1991, 1993
@@ -315,7 +315,9 @@ again:
 	 * Return child pid to parent process,
 	 * marking us as parent via retval[1].
 	 */
-	retval[0] = p2->p_pid;
-	retval[1] = 0;
+	if (retval != NULL) {
+		retval[0] = p2->p_pid;
+		retval[1] = 0;
+	}
 	return (0);
 }