Improve readability after verify_area to access_ok conversion.  The new code
was pretty ugly - this should be a bit better.
Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>