linux-kernel - Re: [PATCH] arm/tegra: add support for tegra30 interrupts

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Message-ID: <20111102195404.GF12913@n2100.arm.linux.org.uk>
Date:	Wed, 2 Nov 2011 19:54:04 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Felipe Balbi <balbi@...com>
Cc:	Nicolas Pitre <nico@...xnic.net>,
	Stephen Warren <swarren@...dia.com>,
	Peter De Schrijver <pdeschrijver@...dia.com>,
	Colin Cross <ccross@...roid.com>,
	Olof Johansson <olof@...om.net>, Gary King <gking@...dia.com>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm/tegra: add support for tegra30 interrupts

On Wed, Nov 02, 2011 at 09:48:28PM +0200, Felipe Balbi wrote:
> Hi,
> 
> you forgot to comment on the fact that gpio_desc shouldn't be held in an
> array. Any comments ?

I did not comment on that because that's someone elses problem.

> What I mean is that, just like irq_descs, we should be able to allocate
> them dynamically. Maybe, just like irq_descs, hold them in a radix tree
> and maybe even have a matching API "gpio_alloc_descs()".

Probably - I expect Grant would really like to see some patches along
those lines.  As I say, someone elses problem.

But what is _our_ problem is what to do with all the ARCH_NR_GPIOs
that we have now, and stop them increasing.  There is a trivial solution
to that which I outlined which can be used until GPIO gets something
along your idea - and which doesn't involve me having to argue with
those who think that the kernel should remain as small as possible.
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