[PATCH] make devmem map only a single page at end of memory

[Jörgen Pihlflyckt]

Hi!

I noticed that the devmem applet maps two consecutive pages of memory in order 
to allow access to a (non-aligned) object that spans two pages. This is a 
problem if we are working with the last page of memory because the next page 
would wrap around to the first page of memory.

This patch makes devmem map only a single page if it is at the end of the 
memory address space.
-- 
Jorgen.Pihlflyckt at ajeco.fi (040-5240412)
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