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From:   Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Date:   Tue, 22 Mar 2022 00:14:58 +0100
Message-ID: <CANiq72=q2FWAfyjPs+VC-H6o8RXCjrXwKbCFJ1kDKGbfYDYnGw@mail.gmail.com>
Subject: Re: Using 3rd party crates in an out-of-tree module
To:     Alex Gaynor <alex.gaynor@gmail.com>
Cc:     =?UTF-8?B?TsOhbmRvciBLcsOhY3Nlcg==?= <bonifaido@gmail.com>,
        rust-for-linux <rust-for-linux@vger.kernel.org>
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On Mon, Mar 21, 2022 at 10:17 PM Alex Gaynor <alex.gaynor@gmail.com> wrote:
>
> I don't know if anyone has given any thought to supporting 3rd party
> crates for out-of-tree modules.

It is possible that we will have some form of dependency support
within the kernel (e.g. to split the `kernel` crate), which could be
used by out-of-tree modules too.

Extending this to Cargo-based crates could be possible, but we would
need a clear use case -- if an out-of-tree module requires a
third-party crate, it is fairly likely others in-tree also need the
same problem solved. It can also complicate submitting the out-of-tree
module later on to mainline if one relied on third-party code which
now has an alternative in-tree.

Cheers,
Miguel