Eric W. Biederman wrote:

Jeremy Fitzhardinge [off-list ref] writes:

quoted

H. Peter Anvin wrote:

quoted

It would be *trivial* to make a certain number of page table slots
available at the end of the head.S-generated map. 

Or you could use a fixmap.

That certain number of page table slots should be the fixmap slots.
If you do that bt_ioremap works, we remove a boatload of special cases
and the code becomes simpler.

It's probably worth noting that several of the non-PC ports already do 
exactly this, although in a hacky way.  Grep for pg0 and you'll find it.

	-hpa