linux-kernel - Re: lockdep and threaded IRQs (was: ...)

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Date:	Mon, 2 Mar 2009 14:40:58 -0800
From:	David Brownell <david-b@...bell.net>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	dbrownell@...rs.sourceforge.net,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>, me@...ipebalbi.com,
	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
	felipe.balbi@...ia.com, dmitry.torokhov@...il.com,
	sameo@...nedhand.com
Subject: Re: lockdep and threaded IRQs (was: ...)

On Monday 02 March 2009, Peter Zijlstra wrote:
> I state that every !IRQF_DISABLED usage is a bug, either
> due to broken hardware or broken drivers.

That's a novel position.  You do realize that removing that
capability breaks drivers?

But if that's what is keeping you from fixing the lockdep bug,
why haven't you submitted patches to remove IRQF_DISABLED from
the kernel, and update all the drivers relying on IRQs being
enabled when their handlers run?

At least that would get the appropriate level of discussion.

- Dave


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