This patch is for ia64 kernel, and defines CONFIG_HOLES_IN_ZONE in
arch/ia64/Kconfig.  IA64 has memory holes smaller than its MAX_ORDER and
its virtual memmap allows holes in a zone's memmap.

This patch makes vmemmap aligned with IA64_GRANULE_SIZE in
arch/ia64/mm/init.c.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>