Linus Torvalds wrote:
> Why do people insist on 
> using the old interfaces (and matching them with the new setup)?


readl/writel is [slightly] faster, and possibility of using even-write 
__raw_writel() exists, in the old interface...

  ...but pci_iomap() is a bus-friendly wrapper that handles a few checks 
and function calls for you, even if you know your device is always MMIO.

A new pci_mmio_map() helper, to be used with 100% MMIO hardware, might 
help eliminate confusion.

	Jeff