linux-kernel - Re: [PATCH v2] pcmcia: Convert io_req_t to use kio_addr

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Message-ID: <20070922091303.GA12525@lst.de>
Date:	Sat, 22 Sep 2007 11:13:03 +0200
From:	Christoph Hellwig <hch@....de>
To:	Matthew Wilcox <matthew@....cx>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Olof Johansson <olof@...om.net>, linuxppc-dev@...abs.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-pcmcia@...ts.infradead.org, linux-kernel@...r.kernel.org,
	hch@....de
Subject: Re: [PATCH v2] pcmcia: Convert io_req_t to use kio_addr_t

On Sat, Sep 22, 2007 at 12:25:51AM -0600, Matthew Wilcox wrote:
> > What about the formatting and field widths ?
> > 
> > ulong would probably be a lot saner than kio_addr_t and yet more type
> > obfuscation.
> 
> I don't think anyone uses ioports > 32bit.  Certainly i386 takes an int
> port as parameter to {in,out}[bwl] (and it really only uses 16-bits).
> parisc uses 24 bits.  I don't know what the various ppcs do, but pci
> bars can only be 32-bit for ioports.  So my opinion is that ioports
> should be uint, not ulong.

The kernel seems to mostly use int, sometimes uint.  I never quite got
why pcmcia had to have it's own strange typedef for them.

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