[PATCH] no buddy bitmap patch revist: for ia64

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>

arch/ia64/Kconfig

@@ -182,6 +182,10 @@ config VIRTUAL_MEM_MAP
 	  require the DISCONTIGMEM option for your machine. If you are
 	  unsure, say Y.
 
+config HOLES_IN_ZONE
+	bool
+	default y if VIRTUAL_MEM_MAP
+
 config DISCONTIGMEM
 	bool "Discontiguous memory support"
 	depends on (IA64_DIG || IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1) && NUMA && VIRTUAL_MEM_MAP

arch/ia64/mm/init.c

@@ -432,7 +432,6 @@ virtual_memmap_init (u64 start, u64 end, void *arg)
 	struct page *map_start, *map_end;
 
 	args = (struct memmap_init_callback_data *) arg;
-
 	map_start = vmem_map + (__pa(start) >> PAGE_SHIFT);
 	map_end   = vmem_map + (__pa(end) >> PAGE_SHIFT);