[merged] mm-memcontrol-reword-obsolete-comment-of-mem_cgroup_unmark_under_oom.patch removed from -mm tree

[merged] mm-memcontrol-reword-obsolete-comment-of-mem_cgroup_unmark_under_oom.patch removed from -mm tree

[akpm]

The patch titled
     Subject: mm: memcontrol: reword obsolete comment of mem_cgroup_unmark_under_oom()
has been removed from the -mm tree.  Its filename was
     mm-memcontrol-reword-obsolete-comment-of-mem_cgroup_unmark_under_oom.patch

This patch was dropped because it was merged into mainline or a subsystem tree

------------------------------------------------------
From: Miaohe Lin <linmiaohe@huawei.com>
Subject: mm: memcontrol: reword obsolete comment of mem_cgroup_unmark_under_oom()

Since commit 79dfdaccd1d5 ("memcg: make oom_lock 0 and 1 based rather than
counter"), the mem_cgroup_unmark_under_oom() is added and the comment of
the mem_cgroup_oom_unlock() is moved here.  But this comment make no sense
here because mem_cgroup_oom_lock() does not operate on under_oom field. 
So we reword the comment as this would be helpful.  [Thanks Michal Hocko
for rewording this comment.]

Link: https://lkml.kernel.org/r/20200930095336.21323-1-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memcontrol.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/mm/memcontrol.c~mm-memcontrol-reword-obsolete-comment-of-mem_cgroup_unmark_under_oom
+++ a/mm/memcontrol.c
@@ -1826,8 +1826,8 @@ static void mem_cgroup_unmark_under_oom(
 	struct mem_cgroup *iter;
 
 	/*
-	 * When a new child is created while the hierarchy is under oom,
-	 * mem_cgroup_oom_lock() may not be called. Watch for underflow.
+	 * Be careful about under_oom underflows becase a child memcg
+	 * could have been added after mem_cgroup_mark_under_oom.
 	 */
 	spin_lock(&memcg_oom_lock);
 	for_each_mem_cgroup_tree(iter, memcg)
_

Patches currently in -mm which might be from linmiaohe@huawei.com are

mm-vmstat-use-helper-macro-abs.patch
mm-fix-some-broken-comments.patch
mm-use-helper-function-put_write_access.patch
percpu_counter-use-helper-macro-abs.patch
mm-migrate-avoid-possible-unnecessary-process-right-check-in-kernel_move_pages.patch