Commit 91925ab8 authored by Miaohe Lin's avatar Miaohe Lin Committed by Andrew Morton
Browse files

mm/migration: avoid unneeded nodemask_t initialization 

Avoid unneeded next_pass and this_pass initialization as they're always
set before using to save possible cpu cycles when there are plenty of
nodes in the system.

Link: https://lkml.kernel.org/r/20220318111709.60311-8-linmiaohe@huawei.com


Signed-off-by: default avatarMiaohe Lin <linmiaohe@huawei.com>
Reviewed-by: default avatarMuchun Song <songmuchun@bytedance.com>
Reviewed-by: default avatarBaolin Wang <baolin.wang@linux.alibaba.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: "Huang, Ying" <ying.huang@intel.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 3eefb826

mm/migrate.c

+2 −2
Original line number Diff line number Diff line
@@ -2345,8 +2345,8 @@ static int establish_migrate_target(int node, nodemask_t *used, 
 */

static void __set_migration_target_nodes(void)

{

	nodemask_t next_pass	= NODE_MASK_NONE;

	nodemask_t this_pass	= NODE_MASK_NONE;

	nodemask_t next_pass;

	nodemask_t this_pass;

	nodemask_t used_targets = NODE_MASK_NONE;

	int node, best_distance;