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From: Alice Ryhl <aliceryhl@google.com>
Date: Sat, 23 Mar 2024 10:58:16 +0100
Message-ID: <CAH5fLggdVDccDwBa3z+3YfjKFLegh7ZvcSzfhnEbAGSk=THKrw@mail.gmail.com>
Subject: Re: [WIP 1/3] rust: Introduce atomic module
To: Andrew Lunn <andrew@lunn.ch>
Cc: Boqun Feng <boqun.feng@gmail.com>, rust-for-linux@vger.kernel.org, 
	linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, 
	llvm@lists.linux.dev, Miguel Ojeda <ojeda@kernel.org>, 
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On Sat, Mar 23, 2024 at 12:52=E2=80=AFAM Andrew Lunn <andrew@lunn.ch> wrote=
:
>
> > +//! These primitives should have the same semantics as their C counter=
parts, for precise definitions
> > +//! of the semantics, please refer to tools/memory-model. Note that Li=
nux Kernel Memory
> > +//! (Consistency) Model is the only model for Rust development in kern=
el right now, please avoid to
> > +//! use Rust's own atomics.
>
> Is it possible to somehow poison rusts own atomics?  I would not be
> too surprised if somebody with good Rust knowledge but new to the
> kernel tries using Rusts atomics. Either getting the compiler to fail
> the build, or it throws an Opps on first invocation would be good.

We could try to get a flag added to the Rust standard library that
removes the core::sync::atomic module entirely, then pass that flag.

Alice