[PATCH] mm, page_alloc: fix build_zonerefs_node()

[Juergen Gross <jgross@suse.com>]

Since commit 9d3be21bf9c0 ("mm, page_alloc: simplify zonelist
initialization") only zones with free memory are included in a built
zonelist. This is problematic when e.g. all memory of a zone has been
ballooned out.

Use populated_zone() when building a zonelist as it has been done
before that commit.

Cc: stable@vger.kernel.org
Fixes: 9d3be21bf9c0 ("mm, page_alloc: simplify zonelist initialization")
Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
---
 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 bdc8f60ae462..3d0662af3289 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6128,7 +6128,7 @@ static int build_zonerefs_node(pg_data_t *pgdat, struct zoneref *zonerefs)
 	do {
 		zone_type--;
 		zone = pgdat->node_zones + zone_type;
-		if (managed_zone(zone)) {
+		if (populated_zone(zone)) {
 			zoneref_set_zone(zone, &zonerefs[nr_zones++]);
 			check_highest_zone(zone_type);
 		}
-- 
2.34.1