[patch 044/131] mm/page_alloc.c: use NODE_MASK_NONE in build_zonelists()

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From: Wei Yang <richard.weiyang@xxxxxxxxx>
Subject: mm/page_alloc.c: use NODE_MASK_NONE in build_zonelists()

Slightly simplify the code by initializing user_mask with NODE_MASK_NONE,
instead of later calling nodes_clear().  This saves a line of code.

Link: http://lkml.kernel.org/r/20200330220840.21228-1-richard.weiyang@xxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
Reviewed-by: John Hubbard <jhubbard@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 mm/page_alloc.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/mm/page_alloc.c~mm-page_allocc-use-node_mask_none-in-build_zonelists
+++ a/mm/page_alloc.c
@@ -5692,14 +5692,13 @@ static void build_zonelists(pg_data_t *p
 {
 	static int node_order[MAX_NUMNODES];
 	int node, load, nr_nodes = 0;
-	nodemask_t used_mask;
+	nodemask_t used_mask = NODE_MASK_NONE;
 	int local_node, prev_node;
 
 	/* NUMA-aware ordering of nodes */
 	local_node = pgdat->node_id;
 	load = nr_online_nodes;
 	prev_node = local_node;
-	nodes_clear(used_mask);
 
 	memset(node_order, 0, sizeof(node_order));
 	while ((node = find_next_best_node(local_node, &used_mask)) >= 0) {
_



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