+ mm-memcontrol-remove-obsolete-comment-of-mem_cgroup_unmark_under_oom.patch added to -mm tree

+ mm-memcontrol-remove-obsolete-comment-of-mem_cgroup_unmark_under_oom.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm: memcontrol: remove obsolete comment of mem_cgroup_unmark_under_oom()
has been added to the -mm tree.  Its filename is
     mm-memcontrol-remove-obsolete-comment-of-mem_cgroup_unmark_under_oom.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-memcontrol-remove-obsolete-comment-of-mem_cgroup_unmark_under_oom.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-memcontrol-remove-obsolete-comment-of-mem_cgroup_unmark_under_oom.patch

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------------------------------------------------------
From: Miaohe Lin <linmiaohe@huawei.com>
Subject: mm: memcontrol: remove 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.

Link: https://lkml.kernel.org/r/20200917105900.4337-1-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

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

--- a/mm/memcontrol.c~mm-memcontrol-remove-obsolete-comment-of-mem_cgroup_unmark_under_oom
+++ a/mm/memcontrol.c
@@ -1825,10 +1825,6 @@ 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.
-	 */
 	spin_lock(&memcg_oom_lock);
 	for_each_mem_cgroup_tree(iter, memcg)
 		if (iter->under_oom > 0)
_

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

mm-swap-fix-confusing-comment-in-release_pages.patch
mm-memcontrol-correct-the-comment-of-mem_cgroup_iter.patch
mm-page_counter-correct-the-obsolete-func-name-in-the-comment-of-page_counter_try_charge.patch
mm-memcontrol-remove-obsolete-comment-of-mem_cgroup_unmark_under_oom.patch
mm-use-helper-function-mapping_allow_writable.patch
mm-vmstat-use-helper-macro-abs.patch
mm-fix-some-broken-comments.patch
mm-migrate-avoid-possible-unnecessary-process-right-check-in-kernel_move_pages.patch