[src/trunk]: src/sys/arch/sparc64/sparc64 Sync cpu_reboot with i386:

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

details:   https://anonhg.NetBSD.org/src/rev/d2d02e206e13
branches:  trunk
changeset: 333299:d2d02e206e13
user:      nakayama <nakayama%NetBSD.org@localhost>
date:      Tue Oct 28 13:04:51 2014 +0000

description:
Sync cpu_reboot with i386:
- avoid sync and unmount after panic.
- remove vfs_shutdown, we call vfs_sync_all and vfs_unmount* instead.
- resurrect doshutdownhooks since some drivers still use it (eg. sab(4)).

diffstat:

 sys/arch/sparc64/sparc64/machdep.c |  14 +++++++++-----
 1 files changed, 9 insertions(+), 5 deletions(-)

diffs (43 lines):

diff -r e9670cd109f4 -r d2d02e206e13 sys/arch/sparc64/sparc64/machdep.c
--- a/sys/arch/sparc64/sparc64/machdep.c        Tue Oct 28 02:49:52 2014 +0000
+++ b/sys/arch/sparc64/sparc64/machdep.c        Tue Oct 28 13:04:51 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: machdep.c,v 1.279 2014/09/21 16:37:34 christos Exp $ */
+/*     $NetBSD: machdep.c,v 1.280 2014/10/28 13:04:51 nakayama Exp $ */
 
 /*-
  * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
@@ -71,7 +71,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.279 2014/09/21 16:37:34 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.280 2014/10/28 13:04:51 nakayama Exp $");
 
 #include "opt_ddb.h"
 #include "opt_multiprocessor.h"
@@ -599,10 +599,13 @@
         */
        maybe_dump(howto);
 
-       if ((howto & RB_NOSYNC) == 0 && !syncdone) {
+       /*
+        * If we've panic'd, don't make the situation potentially
+        * worse by syncing or unmounting the file systems.
+        */
+       if ((howto & RB_NOSYNC) == 0 && panicstr == NULL) {
                if (!syncdone) {
-               syncdone = true;
-               vfs_shutdown();
+                       syncdone = true;
                        /* XXX used to force unmount as well, here */
                        vfs_sync_all(l);
                        /*
@@ -630,6 +633,7 @@
        splhigh();
 
 haltsys:
+       doshutdownhooks();
 
 #ifdef MULTIPROCESSOR
        /* Stop all secondary cpus */