[src/trunk]: src/sys/kern Add an assert to make sure no unexpected spinlocks ...

[matt <matt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/1d5c4755eeb6
branches:  trunk
changeset: 764221:1d5c4755eeb6
user:      matt <matt%NetBSD.org@localhost>
date:      Thu Apr 14 05:33:20 2011 +0000

description:
Add an assert to make sure no unexpected spinlocks are held in mi_switch

diffstat:

 sys/kern/kern_synch.c |  7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diffs (28 lines):

diff -r 6518c8cbc1f5 -r 1d5c4755eeb6 sys/kern/kern_synch.c
--- a/sys/kern/kern_synch.c     Thu Apr 14 05:22:47 2011 +0000
+++ b/sys/kern/kern_synch.c     Thu Apr 14 05:33:20 2011 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kern_synch.c,v 1.286 2011/01/03 13:22:32 pooka Exp $   */
+/*     $NetBSD: kern_synch.c,v 1.287 2011/04/14 05:33:20 matt Exp $    */
 
 /*-
  * Copyright (c) 1999, 2000, 2004, 2006, 2007, 2008, 2009
@@ -69,7 +69,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_synch.c,v 1.286 2011/01/03 13:22:32 pooka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_synch.c,v 1.287 2011/04/14 05:33:20 matt Exp $");
 
 #include "opt_kstack.h"
 #include "opt_perfctrs.h"
@@ -739,6 +739,9 @@
                 * of the last lock - we must remain at IPL_SCHED during
                 * the context switch.
                 */
+               KASSERTMSG(ci->ci_mtx_count == -1,
+                   ("%s: cpu%u: ci_mtx_count (%d) != -1",
+                    __func__, cpu_index(ci), ci->ci_mtx_count));
                oldspl = MUTEX_SPIN_OLDSPL(ci);
                ci->ci_mtx_count--;
                lwp_unlock(l);