linux-kernel - Re: [GIT PULL] MM updates for 6.14-rc1

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Message-ID: <CANiq72=fj0MHiwy5i=FWZxfP_=XsFpjojywF91N6ygdumtQbwQ@mail.gmail.com>
Date: Sun, 26 Jan 2025 21:58:03 +0100
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Uros Bizjak <ubizjak@...il.com>, Miguel Ojeda <ojeda@...nel.org>, 
	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org, mm-commits@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] MM updates for 6.14-rc1

On Sun, Jan 26, 2025 at 7:30 PM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> That seems to be a reasonable assumption. I guess some crazy setup
> *could* install a bindgen that uses a different llvm version than
> rustc itself, but that sounds pretty damn broken.

Tangential to the issue, but a note on this: we have a few warnings in
that `rust_is_available.sh` script for things that "do not look
great", such as bindgen's libclang != Clang when `CC` is Clang, and we
could have a warning for the case you mention, i.e. bindgen's libclang
!= rustc's LLVM.

However, currently some kernel developers use toolchains from upstream
Rust (e.g. from `rustup`) instead of their distributions, so that
could be annoying for them (since their bindgen may be picking
libclang from their distribution).

But eventually when things stabilize more it could make sense, if most
developers stop using those, as a by-default warning.

Cheers,
Miguel