[patch] pcibus_to_node() addition to topology infrastructure

[Matthew Dobson <colpatch@us.ibm.com>]

Linus,
	Here's a patch that adds PCI busses to the list of basic topology 
elements (incl. CPUs, MemBlks, & Nodes).

pcibus_to_node-2.5.44.patch

This patch adds a new topology macro: pcibus_to_node().  This will be 
useful to allow I/O bound processes to bind themselves to CPUs/Nodes 
close to the PCI busses they are communicating over.

1) Adds pcibus_to_node() macro to asm-generic/topology.h
2) Makes small modifications to NUMA-Q PCI code, mostly modifying macros.
3) Uses the macros from #2 to implement pcibus_to_node() in 
asm-i386/topology.h

[mcd@arrakis patches]$ diffstat api_patches/pcibus_to_node-2.5.44.patch
  arch/i386/pci/numa.c           |   33 +++++++++++++++------------------
  include/asm-generic/topology.h |    3 +++
  include/asm-i386/topology.h    |    3 +++
  3 files changed, 21 insertions(+), 18 deletions(-)

Cheers!

-Matt