[PATCH][MTD] mtdpart.c: allow other drivers to get physical address of partition

[Jared Hulbert]

> Neither am I.  My missing puzzle piece is how to zap all page mappings
> for the chip in question.  Maybe the fs/vm meeting at lce will clear
> things up.

I hope so.

> If I started working on this I'd probably want AXFS on one partition and
> JFFS2 on another.  Being able to write to JFFS2 while reading XIP files
> from AXFS without corruptions is the major milestone.  When that works
> we can think about the other 90% of having both write support and XIP in
> the same filesystem.

No problem.  point()'ing to the whole AXFS image lets you do that.
Just turn on XIP support in MTD.

> How serious is Intel about merging AXFS in mainline, btw?

Very.  We've just been super busy helping customers evaluating and I
rearchitected it.  Also I've got lots of these dependancies to work
out.  You think this get_partition_physaddr() was a hack, wait until
you see what I do to mm/memory.c :)

> Maybe another vm person or two.  The vm part is the critical missing
> piece and needs all the brainpower we can get.

Is this worth doing?