[PATCH 1/3] mm, vmscan: Remove redundant check in shrink_zones()

[Mel Gorman]

As pointed out by Minchan Kim, shrink_zones() checks for populated
zones in a zonelist but a zonelist can never contain unpopulated
zones. While it's not related to the node-lru series, it can be
cleaned up now.

Suggested-by: Minchan Kim <minchan@xxxxxxxxxx>
Signed-off-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
---
 mm/vmscan.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 3f06a7a0d135..45344acf52ba 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2605,9 +2605,6 @@ static void shrink_zones(struct zonelist *zonelist, struct scan_control *sc)
 
 	for_each_zone_zonelist_nodemask(zone, z, zonelist,
 					sc->reclaim_idx, sc->nodemask) {
-		if (!populated_zone(zone))
-			continue;
-
 		/*
 		 * Take care memory controller reclaiming has small influence
 		 * to global LRU.
-- 
2.6.4