linux-kernel - Re: [PATCH] pcmcia: ppc64 needs 64-bit ioaddr

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Message-ID: <20070514225946.GB4191@lixom.net>
Date:	Mon, 14 May 2007 17:59:46 -0500
From:	olof@...om.net (Olof Johansson)
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, linuxppc-dev@...abs.org,
	linux-pcmcia@...ts.infradead.org, paulus@...ba.org,
	linux-kernel@...r.kernel.org,
	Dominik Brodowski <linux@...inikbrodowski.net>
Subject: Re: [PATCH] pcmcia: ppc64 needs 64-bit ioaddr_t

On Tue, May 15, 2007 at 08:47:04AM +1000, Benjamin Herrenschmidt wrote:
> On Mon, 2007-05-14 at 15:08 -0700, Andrew Morton wrote:
> > 
> > Well that's some pretty sad code you've found there.  The kernel
> > surely has
> > some appropriate type to use here without us having to invent a new
> > one. 
> > But I suspect if we were to rationalise things in there it will get
> > messy.
> 
> There is more sad stuff involved with drivers assuming IO ports fit in
> int. A proper fix for 2.6.23 will be the rework of PIO allocation I'm
> doing. A temporary fix for 2.6.22 would be for Olof to use
> reserve_phb_iospace() to make sure his PIO gets in the low 31 bits. We
> need to add a spinlock to it though.

Yes, we should do fine with just a 32-bit type and my CF driver being
fixed. I've been travelling and catching up with other things today,
I should have something to post tomorrow.

Andrew, you can drop this patch for now. Sorry for the churn.


-Olof
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