(1/4) discontigmem support for i386 against 2.5.30

This patch was written by Martin Bligh.

It changes all references of node_start_paddr and zone_start_paddr 
to node_start_pfn and zone_start_pfn.  This change is required to support PAE
for i386 discontigmem.  A version of this patch is in the 2.4 aa tree.

Here's Martin's previous discussion regarding these changes:

http://marc.theaimsgroup.com/?l=linux-kernel&m=101925939829917&w=2
http://marc.theaimsgroup.com/?l=linux-kernel&m=101925421326030&w=2

I've tested this patch on the following configurations: UP, SMP, SMP PAE, 
multiquad, multiquad PAE, multiquad DISCONTIGMEM, multiquad DISCONTIGMEM PAE.

Any and all feedback regarding this patch is greatly appreciated.

Thanks,
Pat

-- 
Patricia Gaughen (gone@us.ibm.com)
IBM Linux Technology Center
http://www.ibm.com/linux/ltc/