From a67091837e9de4be5443a2c50dfdeb02273c769e Mon Sep 17 00:00:00 2001
From: ad <ad@NetBSD.org>
Date: Thu, 15 Nov 2007 20:12:25 +0000
Subject: [PATCH] Lock curlwp when updating the start time.

---
 sys/kern/kern_idle.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/sys/kern/kern_idle.c b/sys/kern/kern_idle.c
index a76193f4afa8..1bfa4cd70652 100644
--- a/sys/kern/kern_idle.c
+++ b/sys/kern/kern_idle.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: kern_idle.c,v 1.8 2007/11/13 22:14:35 ad Exp $	*/
+/*	$NetBSD: kern_idle.c,v 1.9 2007/11/15 20:12:25 ad Exp $	*/
 
 /*-
  * Copyright (c)2002, 2006, 2007 YAMAMOTO Takashi,
@@ -28,7 +28,7 @@
 
 #include <sys/cdefs.h>
 
-__KERNEL_RCSID(0, "$NetBSD: kern_idle.c,v 1.8 2007/11/13 22:14:35 ad Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_idle.c,v 1.9 2007/11/15 20:12:25 ad Exp $");
 
 #include <sys/param.h>
 #include <sys/cpu.h>
@@ -48,7 +48,9 @@ idle_loop(void *dummy)
 	struct lwp *l = curlwp;
 
 	/* Update start time for this thread. */
+	lwp_lock(l);
 	microtime(&l->l_stime);
+	lwp_unlock(l);
 
 	KERNEL_UNLOCK_ALL(l, NULL);
 	l->l_stat = LSONPROC;