Message-ID: <416EFFBE.7B8F702@sgi.com>
Date: Thu, 14 Oct 2004 17:37:51 -0500
From: Colin Ngam <cngam@sgi.com>
Organization: SGI
MIME-Version: 1.0
To: Matthew Wilcox <matthew@wil.cx>
CC: Christoph Hellwig <hch@infradead.org>, Greg KH <greg@kroah.com>,
       linux-pci@atrey.karlin.mff.cuni.cz, linux-kernel@vger.kernel.org,
       linux-ia64@vger.kernel.org
Subject: Re: [PATCH] Introduce PCI <-> CPU address conversion [1/2]
References: <20041014124737.GM16153@parcelfarce.linux.theplanet.co.uk> <20041014125348.GA9633@infradead.org> <20041014135323.GO16153@parcelfarce.linux.theplanet.co.uk> <20041014180005.GA11954@infradead.org> <20041014180748.GS16153@parcelfarce.linux.theplanet.co.uk>
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Matthew Wilcox wrote:

> On Thu, Oct 14, 2004 at 07:00:06PM +0100, Christoph Hellwig wrote:
> > For some architectures the sysdata is different for bus vs device, so
> > yes, we do want strict typechecking.
>
> How interesting.  I was under the impression that dev->sysdata was always
> a copy of the bus's.  If that's not guaranteed, then we're just going
> to have to dereference the additional pointer and use the bus' sysdata.

Hi Matthew,

On SGI's Altix system, the sysdata for the device is very much different than
the sysdata for the bus.

Thanks.

colin

>
>
> --
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> he enjoys after this process of grotesque self-deception." -- Mark Twain
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