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Date:   Thu, 23 May 2019 21:21:52 +0300
From:   Alexey Dobriyan <adobriyan@gmail.com>
To:     christian@brauner.io
Cc:     linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH v2 0/2] close_range()
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> This is v2 of this patchset.

We've sent fdmap(2) back in the day:
https://marc.info/?l=linux-kernel&m=150628359803324&w=4

It can do everything close_range() does and potentially more.

If people ask for it I can rebase it and resend.

P.S.: you are 2 steps behind :-)
https://lwn.net/Articles/490224/