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Date: Tue, 24 Jun 2014 15:44:33 -0700 (PDT)
From: David Rientjes <rientjes@google.com>
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To: Wang Sheng-Hui <shhuiw@gmail.com>,
        Michael Kerrisk <mtk.manpages@gmail.com>
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        Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
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        Vladimir Cernov <gg.kaspersky@gmail.com>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, linux-api@vger.kernel.org
Subject: Re: [PATCH] mm: update the description for madvise_remove
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On Tue, 24 Jun 2014, Wang Sheng-Hui wrote:

> 
> Currently, we have more filesystems supporting fallocate, e.g
> ext4/btrfs. Remove the outdated comment for madvise_remove.
> 
> Signed-off-by: Wang Sheng-Hui <shhuiw@gmail.com>
> ---
>  mm/madvise.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/mm/madvise.c b/mm/madvise.c
> index a402f8f..0938b30 100644
> --- a/mm/madvise.c
> +++ b/mm/madvise.c
> @@ -292,9 +292,6 @@ static long madvise_dontneed(struct vm_area_struct *vma,
>  /*
>   * Application wants to free up the pages and associated backing store.
>   * This is effectively punching a hole into the middle of a file.
> - *
> - * NOTE: Currently, only shmfs/tmpfs is supported for this operation.
> - * Other filesystems return -ENOSYS.
>   */
>  static long madvise_remove(struct vm_area_struct *vma,
>                                 struct vm_area_struct **prev,

[For those without context: this patch has been merged into the -mm tree.]

This reference also exists in the man-page for madvise(2), are you 
planning on removing it as well?