Here's a rediff against Greg's current tree.  It adds legacy_io and legacy_mem 
files to each PCI bus directory in sysfs for use by applications that want to 
do old school ISA style programming from userspace.

I'm not sure I've got the sysfs file creation correct, Greg?  Am I passing the 
wrong thing around?  The compile warnings in pci-sysfs.c for the new routines 
seem to indicate that...  Basically I need to get to a pci_bus structure from 
the read/write/mmap routines, and that should be accessible from the kobject 
somewhere, right?

I'll need buy in from Tony, willy, Ben, and Bjorn (and of course Greg) in 
order to submit this for inclusion since I want to make sure that their 
legacy needs are fulfilled.

Thanks,
Jesse