__ioremap_at() in 2.4.0-test9-pre2

[Benjamin Herrenschmidt]

>Life would be much simpler if PCI I/O space used a similar opaque IO base
>cookie with a corresponding ioportremap(cookie) function (looks a lot like
>Dan's tell_me_where() function, which I didn't realize until now :-), before
>feeding everything to inb() and friends. On ia32, ioportremap() would
evaluate
>to the identity.
>
>No way we can convince The Others to use this approach? It does sound logical
>:-)

I'm not sure it would help. It would probably allow a kind of "mapping on
demand" of the IO region on memory mapped IOs platforms, but unless we
add another parameter to ioportremap telling it the pci_dev (or at least
the bus number), we can't "guess" on which IO bus the device is and which
physical base we must use.

Ben.

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