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Date:   Wed, 6 Feb 2019 01:01:04 +0000
From:   Al Viro <viro@zeniv.linux.org.uk>
To:     Jens Axboe <axboe@kernel.dk>
Cc:     Jann Horn <jannh@google.com>, linux-aio@kvack.org,
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Subject: Re: [PATCH 13/18] io_uring: add file set registration
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On Tue, Feb 05, 2019 at 05:27:29PM -0700, Jens Axboe wrote:

> This should be better, passes some basic testing, too:
> 
> http://git.kernel.dk/cgit/linux-block/commit/?h=io_uring&id=01a93aa784319a02ccfa6523371b93401c9e0073
> 
> Verified that we're grabbing the right refs, and don't hold any
> ourselves. For the file registration, forbid registration of the
> io_uring fd, as that is pointless and will introduce a loop regardless
> of fd passing.

*shrug*

So pass it to AF_UNIX socket and register _that_ - does't change the
underlying problem.