linux-kernel - Re: [PATCH v6 3/9] rust: sync: atomic: Add ordering annotation types

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Message-ID: <CANiq72=Oq-JHkBuTAZPVYO5omuXswgGfLXu+nAGwEdRdgkU-0w@mail.gmail.com>
Date: Thu, 10 Jul 2025 20:32:40 +0200
From: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To: Benno Lossin <lossin@...nel.org>
Cc: Boqun Feng <boqun.feng@...il.com>, Andreas Hindborg <a.hindborg@...nel.org>, 
	linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org, 
	lkmm@...ts.linux.dev, linux-arch@...r.kernel.org, 
	Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, Gary Guo <gary@...yguo.net>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>, 
	Danilo Krummrich <dakr@...nel.org>, Will Deacon <will@...nel.org>, Peter Zijlstra <peterz@...radead.org>, 
	Mark Rutland <mark.rutland@....com>, Wedson Almeida Filho <wedsonaf@...il.com>, 
	Viresh Kumar <viresh.kumar@...aro.org>, Lyude Paul <lyude@...hat.com>, 
	Ingo Molnar <mingo@...nel.org>, Mitchell Levy <levymitchell0@...il.com>, 
	"Paul E. McKenney" <paulmck@...nel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	Linus Torvalds <torvalds@...ux-foundation.org>, Thomas Gleixner <tglx@...utronix.de>, 
	Alan Stern <stern@...land.harvard.edu>
Subject: Re: [PATCH v6 3/9] rust: sync: atomic: Add ordering annotation types

On Thu, Jul 10, 2025 at 5:05 PM Benno Lossin <lossin@...nel.org> wrote:
>
> I don't think we have a lint for that, so I'd prefer if we avoid that...
>
> Someone is going to just `use ...::ordering::Any` and then have a
> function `fn<T: Any>(_: T)` in their code and that will be very
> confusing.

I guess there could be a lint that detects a given item being `use`d
which we could use in some cases like this.

I took a quick look, and I see `enum_glob_use`, but that seems global
without a way to filter, and it doesn't cover direct `use`s.

Then there is `wildcard_imports`, and that seems fairly usable (it has
an allowed list), but of course doesn't cover non-wildcard ones.

Cheers,
Miguel