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From:   Daurnimator <quae@daurnimator.com>
Date:   Mon, 4 Jan 2021 01:26:41 +1100
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Subject: Re: [PATCH v6 2/3] io_uring: add IOURING_REGISTER_RESTRICTIONS opcode
To:     Stefano Garzarella <sgarzare@redhat.com>
Cc:     Jens Axboe <axboe@kernel.dk>,
        Kernel Hardening <kernel-hardening@lists.openwall.com>,
        Christian Brauner <christian.brauner@ubuntu.com>,
        io-uring <io-uring@vger.kernel.org>,
        Alexander Viro <viro@zeniv.linux.org.uk>,
        Stefan Hajnoczi <stefanha@redhat.com>,
        Jann Horn <jannh@google.com>, Jeff Moyer <jmoyer@redhat.com>,
        Aleksa Sarai <asarai@suse.de>,
        Sargun Dhillon <sargun@sargun.me>,
        linux-kernel@vger.kernel.org, Kees Cook <keescook@chromium.org>
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On Fri, 28 Aug 2020 at 00:59, Stefano Garzarella <sgarzare@redhat.com> wrote:
> +               __u8 register_op; /* IORING_RESTRICTION_REGISTER_OP */

Can you confirm that this intentionally limited the future range of
IORING_REGISTER opcodes to 0-255?