Messages in this thread Patch in this message | | | Subject | [PATCH] sysrq: disable lockdep on reboot | From | Peter Zijlstra <> | Date | Tue, 26 Sep 2006 17:13:21 +0200 |
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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(); }
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