From d8dc82ee190d08a91052b9fbf693a5267c09c4d0 Mon Sep 17 00:00:00 2001
From: Andrew Morton <akpm@linux-foundation.org>
Date: Fri, 2 Dec 2011 14:12:05 +1100
Subject: [PATCH] mm-exclude-reserved-pages-from-dirtyable-memory-fix

fix highmem build

Cc: Chris Mason <chris.mason@oracle.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Johannes Weiner <jweiner@redhat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Minchan Kim <minchan.kim@gmail.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Shaohua Li <shaohua.li@intel.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 mm/page-writeback.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index f2d6920ebaf2..189263f40b06 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -157,8 +157,7 @@ static unsigned long highmem_dirtyable_memory(unsigned long total)
 			&NODE_DATA(node)->node_zones[ZONE_HIGHMEM];
 
 		x += zone_page_state(z, NR_FREE_PAGES) +
-		     zone_reclaimable_pages(z) -
-		     zone->dirty_balance_reserve;
+		     zone_reclaimable_pages(z) - z->dirty_balance_reserve;
 	}
 	/*
 	 * Make sure that the number of highmem pages is never larger
-- 
2.39.5