Re: [patch 4/6] xip: support non-struct page backed memory

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>  Is there a chance virt_to_phys() can be fixed on arm? It looks like a
>  simple page table walk to me.

Are there functions already available for doing a page table walk?  If
so it could be done. I'd like that.  If somebody could point me in the
right direction I'd appreciate it.

It might be a problem because today the simple case for virt_to_phys()
just subtracts 0x20000000 to go from 0xCXXXXXXX to 0xAXXXXXXX.  So it
could have a negative performance if we complicate it.

Is it possible that it might be easier to fix this if we changed
ioremap()?  I got the impression that ioremap() on ARM ends up placing
ioremap()'ed memory in the middle of the 0xCXXXXXXX range that is
valid for RAM.
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