[PATCH] memcg: use helper macro FLUSH_TIME

[Miaohe Lin <linmiaohe@xxxxxxxxxx>]

Use helper macro FLUSH_TIME to indicate the flush time to improve the
readability a bit. No functional change intended.

Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
---
 mm/memcontrol.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index d8569594239c..f204c9f2e69c 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5397,7 +5397,7 @@ static int mem_cgroup_css_online(struct cgroup_subsys_state *css)
 
 	if (unlikely(mem_cgroup_is_root(memcg)))
 		queue_delayed_work(system_unbound_wq, &stats_flush_dwork,
-				   2UL*HZ);
+				   FLUSH_TIME);
 	lru_gen_online_memcg(memcg);
 	return 0;
 offline_kmem:
-- 
2.27.0