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    SubjectRe: The IO problem on multiple PCI busses
    On Thu, Mar 01, 2001 at 11:09:00AM -0800, David S. Miller wrote:

    I think a cleaner scheme is to allow mmap() on
    /proc/bus/pci/${BUS}/${DEVICE} nodes, that is much cleaner and solves
    transparently any "different word size between userland and kernel"
    issues (specifically 32-bit userlands executing on 64-bit

    This works great for when you want to do IO cycles from userland; but
    what about the case of hardware which requires IO cycles from a
    device driver for some very non-video hardware that may support
    multiple cards across multiple busses?

    Or do I not understand?

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