linux-kernel - [PATCH] mm: use the existing variable instead of a duplicate statement

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Date:   Mon, 25 Nov 2019 14:53:20 +0000
From:   Hao Lee <haolee.swjtu@...il.com>
To:     akpm@...ux-foundation.org
Cc:     mgorman@...e.de, linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        haolee.swjtu@...il.com
Subject: [PATCH] mm: use the existing variable instead of a duplicate
 statement

The address of zone has been stored in variable 'zone', so there is no need
to get it again with a duplicate statement.

Signed-off-by: Hao Lee <haolee.swjtu@...il.com>
---
 mm/vmscan.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index ee4eecc7e1c2..de4b2d1e66be 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -363,22 +363,21 @@ unsigned long lruvec_lru_size(struct lruvec *lruvec, enum lru_list lru, int zone
 	for (zid = zone_idx + 1; zid < MAX_NR_ZONES; zid++) {
 		struct zone *zone = &lruvec_pgdat(lruvec)->node_zones[zid];
 		unsigned long size;
 
 		if (!managed_zone(zone))
 			continue;
 
 		if (!mem_cgroup_disabled())
 			size = mem_cgroup_get_zone_lru_size(lruvec, lru, zid);
 		else
-			size = zone_page_state(&lruvec_pgdat(lruvec)->node_zones[zid],
-				       NR_ZONE_LRU_BASE + lru);
+			size = zone_page_state(zone, NR_ZONE_LRU_BASE + lru);
 		lru_size -= min(size, lru_size);
 	}
 
 	return lru_size;
 
 }
 
 /*
  * Add a shrinker callback to be called from the vm.
  */
-- 
2.14.5