[ GregKH has already done this is USB and PCI core. ]

From: "Warren A. Layton" <zeevon@debian.org>

Based on a request from Matthew Wilcox, convert instances of
pci_dev->slot_name to use pci_name() instead:

  "In order to support PCI Domains, we have to stop using slot_name.
   It's related to driver model transition too since pci_dev->slot_name
   was redundant with pci_dev->dev.bus_id.  So I introduced the inline
   function pci_name().  Now there's about 300-400 places in the tree
   that're using slot_name which need to be converted to use pci_name().
   once that's done, we can remove the slot_name pointer in pci_dev and
   save a (void *) per pci_dev."