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From: David Woodhouse <dwmw2@infradead.org>
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In-Reply-To: <E15H6R1-00066U-00@the-village.bc.nu> 
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To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: dhowells@redhat.com (David Howells), jes@sunsite.dk (Jes Sorensen),
        linux-kernel@vger.kernel.org, arjanv@redhat.com
Subject: Re: [RFC] I/O Access Abstractions 
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Date: Mon, 02 Jul 2001 17:41:36 +0100
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alan@lxorguk.ukuu.org.uk said:
>  The question I think being ignored here is. Why not leave things as
> is.

Because if we just pass in this one extra piece of information which is
normally already available in the driver, we can avoid a whole lot of ugly
cruft in the out-of-line functions by plugging in the correct out-of-line 
function to match the resource. 

> The multiple bus stuff is a port specific detail hidden behind
> readb() and friends. 

The alternative view is that the _single_ bus stuff is a port-specific
detail which has permeated all the drivers and forced the non-i386
architectures' I/O functions to have to try to work out which bus they're
talking to when the driver could have just passed that information to them.

--
dwmw2


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