On Thu, Aug 27, 2009 at 04:29:35PM +0300, Kevin Hilman wrote:
> > The idea is to write to phys_io and io_pg_offset from kernel/head.S
> > very early based on the uart address found in compressed/misc.c
> >
> > To make map_io writable, I will have to change the MACHINE_START to
> > remove the const.  It so happens that Russell has defined
> > MACHINE_START to be a const.
> >
> > Not sure is removing const from MACHINE_START is acceptable?
> 
> we'll find out after you post for RFC.

The answer is no, it is not acceptable - it'll break XIP kernels
because this is placed into the read-only part of the kernel image
no matter what.
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