mm: memcontrol: re-use node VM page state enum

The current duplication is a high-maintenance mess, and it's painful to
add new items or query memcg state from the rest of the VM.

This increases the size of the stat array marginally, but we should aim
to track all these stats on a per-cgroup level anyway.

Link: http://lkml.kernel.org/r/20170404220148.28338-3-hannes@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 3 deletions

diff --git a/mm/vmscan.c b/mm/vmscan.c
index fbec74af2b69..417b6657e994 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2046,8 +2046,7 @@ static bool inactive_list_is_low(struct lruvec *lruvec, bool file,
         active = lruvec_lru_size(lruvec, active_lru, sc->reclaim_idx);
 
         if (memcg)
-                refaults = mem_cgroup_read_stat(memcg,
-                                                MEMCG_WORKINGSET_ACTIVATE);
+                refaults = mem_cgroup_read_stat(memcg, WORKINGSET_ACTIVATE);
         else
                 refaults = node_page_state(pgdat, WORKINGSET_ACTIVATE);
 
@@ -2735,7 +2734,7 @@ static void snapshot_refaults(struct mem_cgroup *root_memcg, pg_data_t *pgdat)
 
                 if (memcg)
                         refaults = mem_cgroup_read_stat(memcg,
-                                                MEMCG_WORKINGSET_ACTIVATE);
+                                                        WORKINGSET_ACTIVATE);
                 else
                         refaults = node_page_state(pgdat, WORKINGSET_ACTIVATE);