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

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Message-Id: <20090227183949.90f231e6.akpm@linux-foundation.org>
Date:	Fri, 27 Feb 2009 18:39:49 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	David Brownell <david-b@...bell.net>
Cc:	me@...ipebalbi.com, linux-kernel@...r.kernel.org,
	linux-input@...r.kernel.org, felipe.balbi@...ia.com,
	dmitry.torokhov@...il.com, sameo@...nedhand.com,
	a.p.zijlstra@...llo.nl, tglx@...utronix.de
Subject: Re: lockdep and threaded IRQs (was: ...)

On Fri, 27 Feb 2009 18:30:36 -0800 David Brownell <david-b@...bell.net> wrote:

> > ah, OK, twl4030_i2c_read_u8() does i2c I/O.
> > 
> > Can't do that. 
> 
> Threaded IRQ handlers *can* do that.  That's the point.
> 
> Now, if you were to say "keep waiting a few more years
> until some threaded IRQ framework finally merges" ...
> the question comes up, "What to do in the meanwhile".
> (Ditto, "well, we've been waiting a long time now to
> see those threaded IRQs, what's up with them?")

I don't have a clue what you're talking about.  Where is this "threaded
irq handler" implementation of which you speak?  File and line?

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