linux-kernel - [QUESTION] Can we remove the local_irq

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Date:	Fri, 7 Sep 2012 02:19:12 +0000
From:	"Liu, Chuansheng" <chuansheng.liu@...el.com>
To:	"'linux-kernel@...r.kernel.org' (linux-kernel@...r.kernel.org)" 
	<linux-kernel@...r.kernel.org>
CC:	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"a.p.zijlstra@...llo.nl" <a.p.zijlstra@...llo.nl>
Subject: [QUESTION] Can we remove the local_irq_enable() in function panic()?

Hi all,

Could some one give help that removing the local_irq_enable() in function panic()?

Currently I meet one case that when panic happening at irq disabling state with spin_lock,
After panic() is called, due to local_irq_enable() is called, it causes some interrupts come,
and cause more issue that "BUG: spinlock recursion on CPU#0".

Checked the git history, do not find any hint for local_irq_enable(), can any share something?
Thanks.

Panic()
{
....
	local_irq_enable();
	for (i = 0; ; i += PANIC_TIMER_STEP) {
....
}

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