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memcg: remove unused mem_cgroup->oom_wakeups
Since commit 4942642080
("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>
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@ -287,7 +287,6 @@ struct mem_cgroup {
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bool oom_lock;
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atomic_t under_oom;
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atomic_t oom_wakeups;
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int swappiness;
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/* OOM-Killer disable */
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@ -1850,17 +1849,10 @@ static int memcg_oom_wake_function(wait_queue_t *wait,
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return autoremove_wake_function(wait, mode, sync, arg);
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}
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static void memcg_wakeup_oom(struct mem_cgroup *memcg)
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{
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atomic_inc(&memcg->oom_wakeups);
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/* for filtering, pass "memcg" as argument. */
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__wake_up(&memcg_oom_waitq, TASK_NORMAL, 0, memcg);
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}
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static void memcg_oom_recover(struct mem_cgroup *memcg)
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{
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if (memcg && atomic_read(&memcg->under_oom))
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memcg_wakeup_oom(memcg);
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__wake_up(&memcg_oom_waitq, TASK_NORMAL, 0, memcg);
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}
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static void mem_cgroup_oom(struct mem_cgroup *memcg, gfp_t mask, int order)
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