From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: linux-kernel <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>
Cc: notting@redhat.com, Dave Jones <davej@redhat.com>,
Ingo Molnar <mingo@elte.hu>, arjan <arjan@infradead.org>
Subject: [PATCH] sysrq: disable lockdep on reboot
Date: Tue, 26 Sep 2006 17:13:21 +0200 [thread overview]
Message-ID: <1159283602.5038.25.camel@lappy> (raw)
SysRq : Emergency Sync
Emergency Sync complete
SysRq : Emergency Remount R/O
Emergency Remount complete
SysRq : Resetting
BUG: warning at kernel/lockdep.c:1816/trace_hardirqs_on() (Not tainted)
Call Trace:
[<ffffffff8026d56d>] show_trace+0xae/0x319
[<ffffffff8026d7ed>] dump_stack+0x15/0x17
[<ffffffff802a68d1>] trace_hardirqs_on+0xbc/0x13d
[<ffffffff803a8eec>] sysrq_handle_reboot+0x9/0x11
[<ffffffff803a8f8d>] __handle_sysrq+0x99/0x130
[<ffffffff803a903b>] handle_sysrq+0x17/0x19
[<ffffffff803a36ee>] kbd_event+0x32e/0x57d
[<ffffffff80401e35>] input_event+0x42d/0x45b
[<ffffffff804063eb>] atkbd_interrupt+0x44d/0x53d
[<ffffffff803fe5c5>] serio_interrupt+0x49/0x86
[<ffffffff803ff2a4>] i8042_interrupt+0x202/0x21a
[<ffffffff80210cf0>] handle_IRQ_event+0x2c/0x64
[<ffffffff802bfd8b>] __do_IRQ+0xaf/0x114
[<ffffffff8026ea24>] do_IRQ+0xf8/0x107
[<ffffffff8025f886>] ret_from_intr+0x0/0xf
DWARF2 unwinder stuck at ret_from_intr+0x0/0xf
Leftover inexact backtrace:
<IRQ> <EOI> [<ffffffff80258e36>] mwait_idle+0x3f/0x54
[<ffffffff8024a33a>] cpu_idle+0xa2/0xc5
[<ffffffff8026c34e>] rest_init+0x2b/0x2d
[<ffffffff809708bc>] start_kernel+0x24a/0x24c
[<ffffffff8097028b>] _sinittext+0x28b/0x292
Since we're shutting down anyway, don't bother being smart,
just turn the thing off.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
---
drivers/char/sysrq.c | 1 +
1 file changed, 1 insertion(+)
Index: linux-2.6-lappy/drivers/char/sysrq.c
===================================================================
--- linux-2.6-lappy.orig/drivers/char/sysrq.c 2006-09-26 17:08:02.000000000 +0200
+++ linux-2.6-lappy/drivers/char/sysrq.c 2006-09-26 17:10:16.000000000 +0200
@@ -113,6 +113,7 @@ static struct sysrq_key_op sysrq_crashdu
static void sysrq_handle_reboot(int key, struct pt_regs *pt_regs,
struct tty_struct *tty)
{
+ lockdep_off();
local_irq_enable();
emergency_restart();
}
next reply other threads:[~2006-09-26 15:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-26 15:13 Peter Zijlstra [this message]
2006-09-27 8:10 ` [PATCH] sysrq: disable lockdep on reboot Ingo Molnar
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1159283602.5038.25.camel@lappy \
--to=a.p.zijlstra@chello.nl \
--cc=akpm@osdl.org \
--cc=arjan@infradead.org \
--cc=davej@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=notting@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox