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Subject[PATCH v2 07/11] mm/migration: avoid unneeded nodemask_t initialization
Date
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.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
---
mm/migrate.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index 92068d090db8..bb36f6b40f18 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2379,8 +2379,8 @@ 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;

--
2.23.0
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