linux-kernel - Re: [2.6.26-rc5-git2] WARNING: at kernel/lockdep.c:2658 check

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Date:	Thu, 12 Jun 2008 09:05:06 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Vegard Nossum <vegard.nossum@...il.com>
Cc:	Alessandro Suardi <alessandro.suardi@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [2.6.26-rc5-git2] WARNING: at kernel/lockdep.c:2658
	check_flags+0x4c/0x128()

On Thu, 2008-06-12 at 08:55 +0200, Vegard Nossum wrote:


> From: Vegard Nossum <vegard.nossum@...il.com>
> Date: Thu, 12 Jun 2008 08:49:18 +0200
> Subject: [PATCH] x86: more hardirq annotations for notify_die()
> 
> Reported-by: Alessandro Suardi <alessandro.suardi@...il.com>
> Signed-off-by: Vegard Nossum <vegard.nossum@...il.com>
> ---
>  arch/x86/kernel/traps_32.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
> index bde6f63..be9ecae 100644
> --- a/arch/x86/kernel/traps_32.c
> +++ b/arch/x86/kernel/traps_32.c
> @@ -569,6 +569,7 @@ void do_##name(struct pt_regs *regs, long error_code)			\
>  #define DO_VM86_ERROR(trapnr, signr, str, name)				\
>  void do_##name(struct pt_regs *regs, long error_code)			\
>  {									\
> +	trace_hardirqs_fixup();						\
>  	if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr)	\
>  						== NOTIFY_STOP)		\
>  		return;							\

Yeah, I think this is ok, actual traps don't have any way of knowing the
actual IRQ state afaik. So

Acked-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>

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