linux-kernel - Re: [PATCH v2 1/2] rust: add untrusted data abstraction

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Message-ID: <CANiq72=-bV_=TUoH6gLnPwTcxROBqyrCpOpbumki_S+po1TPhQ@mail.gmail.com>
Date: Fri, 27 Sep 2024 10:39:43 +0200
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Benno Lossin <benno.lossin@...ton.me>
Cc: kernel test robot <lkp@...el.com>, Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, 
	Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Andreas Hindborg <a.hindborg@...nel.org>, Alice Ryhl <aliceryhl@...gle.com>, 
	Trevor Gross <tmgross@...ch.edu>, llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev, 
	Greg KH <greg@...ah.com>, Simona Vetter <simona.vetter@...ll.ch>, linux-kernel@...r.kernel.org, 
	rust-for-linux@...r.kernel.org
Subject: Re: [PATCH v2 1/2] rust: add untrusted data abstraction

On Fri, Sep 27, 2024 at 12:15 AM Benno Lossin <benno.lossin@...ton.me> wrote:
>
> Personally, I would prefer adding a symbol. Since if we allow it, then
> it might take a long time until the code is removed once we increase the
> minimum version.
>
> It would be best, if it produces an error when we raise the minimum
> version beyond the one represented by the symbol. Is that already the
> case?

No -- that is a nice idea that I guess could be implemented in Kconfig
somewhere (i.e. when checking conditions). However, one of the common
things to do when upgrading the minimum is to review/clean the
`*_VERSION` uses anyway (and they may occur outside Kconfig files
too), and also sometimes one wants to upgrade a minimum without doing
the cleanups immediately (e.g. the recently proposed GCC 8.1 upgrade).

> Gave it a try and I also can't reproduce the error there...

Hmm... I think CE uses the Rust-provided binaries (and I guess the
playground too). Do you have a link ("Share" in CE)?

Cheers,
Miguel