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From:   Kent Overstreet <kent.overstreet@linux.dev>
To:     TruongSinh Tran-Nguyen <i@truongsinh.pro>
Cc:     Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>,
        rust-for-linux@vger.kernel.org,
        Wedson Almeida Filho <wedsonaf@gmail.com>,
        linux-bcachefs@vger.kernel.org, Andreas Hindborg <nmi@metaspace.dk>
Subject: Re: [PATCH] chore(util): minimal Rust build example
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On Thu, May 11, 2023 at 04:54:34PM -0700, TruongSinh Tran-Nguyen wrote:
> > If you mean UAPI in "native" Rust, then we don't provide Rust ones
> > yet. We may need to wait until Rust is not an experiment anymore
> > within the kernel to do something like that.
> 
> Yes I mean UAPI in "native" Rust. If its not provided right now, and
> there is a kernel module written fully in Rust, then is it recommended
> to have it have `repr(c)/[no_mangle]` and use cbindgen to generate
> UAPI in C (linux/*.h)?

This doesn't sound like a uapi question, it sounds more like - how do we
expose C interfaces from Rust?

That's a good question. Do we have a sort of reverse-bindgen, that can
emit a C header file for repr(c) functions?