On Tue, 2009-11-24 at 18:09 +0100, Albert Herranz wrote:

I could use ppc_md.ioremap to duplicate ioremap except for the ioremap
ram check.
But calling the stock ioremap without modifying it is not possible
because it checks and bails out when ioremapping a region marked as
ram (even if it's not real ram and it's memreserved).

Is the list of memreserved areas preserved once the kernel is running?
If it is preserved another option would be to unban ioremapping ram if
memreserved.

Yes, check lmb's they should still be around.

Cheers,
Ben.