mm/memory.c: In function `zeromap_pud_range':
mm/memory.c:1053: warning: suggest parentheses around + or - inside shift
mm/memory.c: In function `remap_pud_range':
mm/memory.c:1170: warning: suggest parentheses around + or - inside shift

Parenthesize this macro arg.

Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>