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) { _
