memcg: remove unused mem_cgroup->oom_wakeups
Since commit 4942642080ea ("mm: memcg: handle non-error OOM situations
more gracefully"), nobody uses mem_cgroup->oom_wakeups. Remove it.
While at it, also fold memcg_wakeup_oom() into memcg_oom_recover() which
is its only user. This cleanup was suggested by Michal.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 8da44a0..6a5f5d5 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -287,7 +287,6 @@
bool oom_lock;
atomic_t under_oom;
- atomic_t oom_wakeups;
int swappiness;
/* OOM-Killer disable */
@@ -1850,17 +1849,10 @@
return autoremove_wake_function(wait, mode, sync, arg);
}
-static void memcg_wakeup_oom(struct mem_cgroup *memcg)
-{
- atomic_inc(&memcg->oom_wakeups);
- /* for filtering, pass "memcg" as argument. */
- __wake_up(&memcg_oom_waitq, TASK_NORMAL, 0, memcg);
-}
-
static void memcg_oom_recover(struct mem_cgroup *memcg)
{
if (memcg && atomic_read(&memcg->under_oom))
- memcg_wakeup_oom(memcg);
+ __wake_up(&memcg_oom_waitq, TASK_NORMAL, 0, memcg);
}
static void mem_cgroup_oom(struct mem_cgroup *memcg, gfp_t mask, int order)