From a938c356d5b007fe6d28251c0ddbf6c11d0d92b5 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rjw@sisk.pl>
Date: Fri, 23 Jun 2006 02:04:46 -0700
Subject: [PATCH] [PATCH] swsusp: take lowmem reserves into account

swsusp allocates memory from the normal zone, so it cannot use lowmem
reserve pages from the lower zones.  Therefore it should not count these
pages as available to it.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 kernel/power/swsusp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/power/swsusp.c b/kernel/power/swsusp.c
index 78b6e71b081..f0ee4e7780d 100644
--- a/kernel/power/swsusp.c
+++ b/kernel/power/swsusp.c
@@ -188,8 +188,10 @@ int swsusp_shrink_memory(void)
 			PAGES_FOR_IO;
 		tmp = size;
 		for_each_zone (zone)
-			if (!is_highmem(zone))
+			if (!is_highmem(zone) && populated_zone(zone)) {
 				tmp -= zone->free_pages;
+				tmp += zone->lowmem_reserve[ZONE_NORMAL];
+			}
 		if (tmp > 0) {
 			tmp = __shrink_memory(tmp);
 			if (!tmp)