linux-kernel - Re: [RFC] What are the goals for the architecture of an in-kernel IR system?

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Date:	Tue, 08 Dec 2009 15:06:31 +0100
From:	Krzysztof Halasa <khc@...waw.pl>
To:	Mauro Carvalho Chehab <mchehab@...hat.com>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Gerd Hoffmann <kraxel@...hat.com>,
	Jarod Wilson <jarod@...sonet.com>,
	Christoph Bartelmus <lirc@...telmus.de>, awalls@...ix.net,
	j@...nau.net, jarod@...hat.com, jonsmirl@...il.com,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-media@...r.kernel.org, superm1@...ntu.com
Subject: Re: [RFC] What are the goals for the architecture of an in-kernel IR  system?

Mauro Carvalho Chehab <mchehab@...hat.com> writes:

> Yes, an opaque type for scancode at the userspace API can be better, but
> passing a pointer to kernel will require some compat32 logic (as pointer
> size is different on 32 and 64 bits).

Yes. I think we can't avoid that, but it's a single compat handler,
I wouldn't worry about it too much. We don't need it in every driver
fortunately.

> We may use something like an u8[] with an arbitrary large number of
> bytes.

Yes. All of this pointed to by the pointer.

> In this case, we need to take some care to avoid LSB/MSB troubles.

Sure.
-- 
Krzysztof Halasa
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