[patch 056/101] mm, vmscan: remove redundant check in shrink_zones()

[patch 056/101] mm, vmscan: remove redundant check in shrink_zones()

[akpm]

From: Mel Gorman <mgorman@techsingularity.net>
Subject: mm, vmscan: remove redundant check in shrink_zones()

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.

Link: http://lkml.kernel.org/r/1468853426-12858-2-git-send-email-mgorman@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Suggested-by: Minchan Kim <minchan@kernel.org>
Acked-by: Minchan Kim <minchan@kernel.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/vmscan.c |    3 ---
 1 file changed, 3 deletions(-)

diff -puN mm/vmscan.c~mm-vmscan-remove-redundant-check-in-shrink_zones mm/vmscan.c
--- a/mm/vmscan.c~mm-vmscan-remove-redundant-check-in-shrink_zones
+++ a/mm/vmscan.c
@@ -2605,9 +2605,6 @@ static void shrink_zones(struct zonelist
 
 	for_each_zone_zonelist_nodemask(zone, z, zonelist,
 					sc->reclaim_idx, sc->nodemask) {
-		if (!populated_zone(zone))
-			continue;