Patricia Gaughen wrote:
> This patch was written by Dave Hansen, I just brought it forward to
> 2.5.62 :-)
>
> This patch is used by the x440 discontigmem to map the srat tables
> into low memory so that the memory can be setup.  This remap function
> is used very early in the boot process... at the start of
> setup_arch().
>
> Dave posted this previously to linux-kernel.  Here's a pointer to his
> email:
> http://marc.theaimsgroup.com/?l=linux-kernel&m=104515534619345&w=2

Here's a patch that makes the early ioremap conditional on Summit, and
NUMA.

-- 
Dave Hansen
haveblue@us.ibm.com