From afed2bd42e3199f1834074e37cd9c067ae35df9b Mon Sep 17 00:00:00 2001
From: Jiang Liu <liuj97@gmail.com>
Date: Thu, 7 Feb 2013 12:26:42 +1100
Subject: [PATCH] mm: set zone->present_pages to number of existing pages in
 the zone

Now all users of "number of pages managed by the buddy system" have been
converted to use zone->managed_pages, so set zone->present_pages to what
it should be:

	present_pages = spanned_pages - absent_pages;

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Wen Congyang <wency@cn.fujitsu.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Jiang Liu <jiang.liu@huawei.com>
Cc: Maciej Rutecki <maciej.rutecki@gmail.com>
Cc: Chris Clayton <chris2553@googlemail.com>
Cc: "Rafael J . Wysocki" <rjw@sisk.pl>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Minchan Kim <minchan@kernel.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Jianguo Wu <wujianguo@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 mm/page_alloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e59760bab13f..79b9fb7ec6ca 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4647,7 +4647,7 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat,
 		nr_all_pages += freesize;
 
 		zone->spanned_pages = size;
-		zone->present_pages = freesize;
+		zone->present_pages = realsize;
 		/*
 		 * Set an approximate value for lowmem here, it will be adjusted
 		 * when the bootmem allocator frees pages into the buddy system.
-- 
2.39.5