RE: [patch 2/2] /dev/mem validate mmap requests

[Luck, Tony]

> Tony, can you ack/nak this please?  It touches both ia64 and generic
> code.

So if someone tries to mmap a range that spans across more than
one EFI memory descriptor, the size will get trimmed back to an
EFI memory boundary.  Isn't that a problem since 1<<EFI_PAGE_SHIFT
is less than the default ia64 Linux page size?

I think you may need a more complex checker that does aggregation
of adjacent efi memory descriptors with the same attributes.

-Tony
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