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authorMiaohe Lin <linmiaohe@huawei.com>2022-04-29 09:16:08 +0300
committerakpm <akpm@linux-foundation.org>2022-04-29 09:16:08 +0300
commit91925ab8cc2a05ab0e524830247e1d66ba4e4e19 (patch)
tree2ada8dd11edef283f3821fbb00b08c5ab6dec699 /mm/migrate.c
parent3eefb826c5a627084eccec788f0236a070988dae (diff)
downloadlinux-91925ab8cc2a05ab0e524830247e1d66ba4e4e19.tar.xz
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: Miaohe Lin <linmiaohe@huawei.com> Reviewed-by: Muchun Song <songmuchun@bytedance.com> Reviewed-by: Baolin 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: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/migrate.c')
-rw-r--r--mm/migrate.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/migrate.c b/mm/migrate.c
index 02448b618c6b..d9f378b623ea 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2345,8 +2345,8 @@ out_clear:
*/
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;