> How about this instead?
> /* Backwards compatibility for first N PCI domains. */
> if (pci_domain_nr(dev->bus) > PCI_PROC_MAX_DOMAIN)
> return 0;
> PCI_PROC_MAX_DOMAIN could be defined in asm/pci.h (255 on alpha), default 0.
A runtime test would be useful, at least for ppc64. That would allow our
older machines to work (multiple host bridges without overlapping
buses). What if we had pci_proc_max_domain and arch code could change its
value during pcibios_init?
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