Subject: Re: [RFC PATCH 14/19] powerpc: allow ioremap within reserved fake ram regions

From: Benjamin Herrenschmidt <[email-masked]>
Date: Thu, 26 Nov 2009 16:22:19 +1100

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.