From 03f6462a3ae78f36eb1f0ee8b4d5ae2f7859c1d5 Mon Sep 17 00:00:00 2001
From: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Date: Mon, 21 Sep 2009 17:03:35 -0700
Subject: mm: move highest_memmap_pfn

Move highest_memmap_pfn __read_mostly from page_alloc.c next to zero_pfn
__read_mostly in memory.c: to help them share a cacheline, since they're
very often tested together in vm_normal_page().

Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: Rik van Riel <riel@redhat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/memory.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'mm/memory.c')

diff --git a/mm/memory.c b/mm/memory.c
index 9bdbd10cb418..b1443ac07c00 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -109,6 +109,7 @@ static int __init disable_randmaps(char *s)
 __setup("norandmaps", disable_randmaps);
 
 unsigned long zero_pfn __read_mostly;
+unsigned long highest_memmap_pfn __read_mostly;
 
 /*
  * CONFIG_MMU architectures set up ZERO_PAGE in their paging_init()
-- 
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