linux-kernel - Re: [PATCH 0/6] Initial Rust V4L2 support

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Message-ID: <aae753d6-6874-4f91-e7ba-bd6c77f07b62@metux.net>
Date:   Wed, 26 Apr 2023 15:22:14 +0200
From:   "Enrico Weigelt, metux IT consult" <lkml@...ux.net>
To:     Theodore Ts'o <tytso@....edu>,
        Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
Cc:     Deborah Brouwer <deborah.brouwer@...labora.com>,
        Daniel Almeida <daniel.almeida@...labora.com>,
        wedsonaf@...il.com, ojeda@...nel.org, mchehab@...nel.org,
        hverkuil@...all.nl, rust-for-linux@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        kernel@...labora.com
Subject: Re: [PATCH 0/6] Initial Rust V4L2 support

On 12.04.23 04:58, Theodore Ts'o wrote:

> Something that would perhaps be useful is to document (a) what
> versions of Rust is available for various distributions, or pointers
> to how to get that information for various distributions.  For
> example, you can get that information from Debian using [1].  It
> appears that Fedora isn't distributing rustc at *all*, at least
> according to [2], so apparently for Fedora people will need to install
> it from source.

As already said in my other mail, one major problem IMHO is (recent 
enough) toolchain availability for the major distros and package build
systems - including the embedded ones (ptxdist, buildroot, bitbake,
...).

IMHO, those who want Rust in the kernel, should take care of this first.
(and no: asking to download some precompiled binary from somewhere is
not any acceptable solution)

> If the goal is accelerate adoption of Rustc, and calm people's fears
> vis-a-vis using Rust, it's not enough to say, "why don't you use the
> distribution-provided version or Rust"?  It would be helpful if those
> Rust pioneers can share what versions of Rust they have tested
> against, especially for those commonly used distributions, such as
> Debian, and give us a report whether we should expect things to work,
> so we can ignore the scary warning from the build system that we're
> using an unsupported version of Rust, and if it breaks, we get to keep
> both pieces.

ACK. Maybe those folks could set up some CIs for at least building and
deploying the Rust patches on as many distros as possible - hopefully
before they're sent to lkml.


--mtx

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Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
info@...ux.net -- +49-151-27565287