From: "Yinghai Lu" <yhlu.kernel@gmail.com>

Allocate section_map in bootmem instead of using __initdata.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/sparse.c |   14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff -puN mm/sparse.c~mm-allocate-section_map-for-sparse_init mm/sparse.c
--- a/mm/sparse.c~mm-allocate-section_map-for-sparse_init
+++ a/mm/sparse.c
@@ -287,8 +287,6 @@ struct page __init *sparse_early_mem_map
 	return NULL;
 }
 
-/* section_map pointer array is 64k */
-static __initdata struct page *section_map[NR_MEM_SECTIONS];
 /*
  * Allocate the accumulated non-linear sections, allocate a mem_map
  * for each and record the physical to section mapping.
@@ -298,6 +296,9 @@ void __init sparse_init(void)
 	unsigned long pnum;
 	struct page *map;
 	unsigned long *usemap;
+	struct page **section_map;
+	int size;
+	int node;
 
 	/*
 	 * map is using big page (aka 2M in x86 64 bit)
@@ -307,13 +308,17 @@ void __init sparse_init(void)
 	 * then in big system, the memmory will have a lot hole...
 	 * here try to allocate 2M pages continously.
 	 */
+	size = sizeof(struct page *) * NR_MEM_SECTIONS;
+	section_map = alloc_bootmem(size);
+	if (!section_map)
+		panic("can not allocate section_map\n");
+
 	for (pnum = 0; pnum < NR_MEM_SECTIONS; pnum++) {
 		if (!present_section_nr(pnum))
 			continue;
 		section_map[pnum] = sparse_early_mem_map_alloc(pnum);
 	}
 
-
 	for (pnum = 0; pnum < NR_MEM_SECTIONS; pnum++) {
 		if (!present_section_nr(pnum))
 			continue;
@@ -329,6 +334,9 @@ void __init sparse_init(void)
 		sparse_init_one_section(__nr_to_section(pnum), pnum, map,
 								usemap);
 	}
+
+	for_each_online_node(node)
+		free_bootmem_node(NODE_DATA(node), __pa(section_map), size);
 }
 
 #ifdef CONFIG_MEMORY_HOTPLUG
_