[src/trunk]: src/sys/kern in pmf_system_shutdown(), don't do anything if we'r...

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

details:   https://anonhg.NetBSD.org/src/rev/1534c80bed14
branches:  trunk
changeset: 782668:1534c80bed14
user:      chs <chs%NetBSD.org@localhost>
date:      Tue Nov 13 14:08:07 2012 +0000

description:
in pmf_system_shutdown(), don't do anything if we're panicing.
this prevents a hang trying to shut down other CPUs on x86,
and in general we could be called in any context from a panic
so it's best to skip unnecessary operations in that case.

diffstat:

 sys/kern/kern_pmf.c |  8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diffs (29 lines):

diff -r 5eaa95b70ae2 -r 1534c80bed14 sys/kern/kern_pmf.c
--- a/sys/kern/kern_pmf.c       Tue Nov 13 14:07:42 2012 +0000
+++ b/sys/kern/kern_pmf.c       Tue Nov 13 14:08:07 2012 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: kern_pmf.c,v 1.35 2011/06/05 09:04:22 dsl Exp $ */
+/* $NetBSD: kern_pmf.c,v 1.36 2012/11/13 14:08:07 chs Exp $ */
 
 /*-
  * Copyright (c) 2007 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_pmf.c,v 1.35 2011/06/05 09:04:22 dsl Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_pmf.c,v 1.36 2012/11/13 14:08:07 chs Exp $");
 
 #include <sys/types.h>
 #include <sys/param.h>
@@ -381,6 +381,10 @@
 void
 pmf_system_shutdown(int how)
 {
+
+       if (panicstr != NULL)
+               return;
+
        aprint_debug("Shutting down devices:");
        shutdown_all(how);
 }