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Date:   Sat, 11 Apr 2020 12:32:10 -0700
From:   Matthew Wilcox <willy@infradead.org>
To:     Ethon Paul <ethp@qq.com>
Cc:     akpm@linux-foundation.org, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm/filemap: Fix a typo in comment
 "unneccssary"->"unnecessary"
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On Sat, Apr 11, 2020 at 02:51:41PM +0800, Ethon Paul wrote:
> @@ -1259,7 +1259,7 @@ EXPORT_SYMBOL_GPL(add_page_wait_queue);
>   * instead.
>   *
>   * The read of PG_waiters has to be after (or concurrently with) PG_locked
> - * being cleared, but a memory barrier should be unneccssary since it is
> + * being cleared, but a memory barrier should be unnecessary since it is
>   * in the same byte as PG_locked.
>   */
>  static inline bool clear_bit_unlock_is_negative_byte(long nr, volatile void *mem)

This will conflict with the patch series I sent here:
<20200326122429.20710-1-willy@infradead.org>

which deletes the entire comment.