linux-kernel - Re: [PATCH 0/3] Synaptics

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Message-Id: <200609132200.51342.dtor@insightbb.com>
Date:	Wed, 13 Sep 2006 22:00:50 -0400
From:	Dmitry Torokhov <dtor@...ightbb.com>
To:	Jiri Kosina <jikos@...os.cz>
Cc:	Andrew Morton <akpm@...l.org>, lkml <linux-kernel@...r.kernel.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Dave Jones <davej@...hat.com>
Subject: Re: [PATCH 0/3] Synaptics - fix lockdep warnings

Hi Jiri,

On Wednesday 13 September 2006 20:44, Jiri Kosina wrote:
> Both warnings have been solved by splitting the respective functions to 
> nested and non-nested variants, and calling them from synpatics driver as 
> appropriate.
>  

Unfortunately these patches do not solve the problem in general but
rather fix one specific codepath. As far as I can see the warnings will
return as soon as we add another pass-through port to the link (and I am
considering adding a pass-through port to the trackpoint driver so you
will get chain like i8042-synaptics-ptport-trackpoint-ptport-psmouse).

Plus they are ugly and complicate serio and psmouse cores. I really
don't like this *_nested business as it makes the code aware of possible
usage patterns instead of just being re-entrant.

-- 
Dmitry
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