linux-kernel - Re: [PATCH v7 2/9] rust: sync: Add basic atomic operation mapping framework

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Message-Id: <DBBV9KHTEM3E.3T10KY9JN754X@kernel.org>
Date: Mon, 14 Jul 2025 17:00:56 +0200
From: "Benno Lossin" <lossin@...nel.org>
To: "Boqun Feng" <boqun.feng@...il.com>
Cc: <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>, "Andreas Hindborg" <a.hindborg@...nel.org>,
 "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 v7 2/9] rust: sync: Add basic atomic operation mapping
 framework

On Mon Jul 14, 2025 at 3:42 PM CEST, Boqun Feng wrote:
> On Mon, Jul 14, 2025 at 12:03:11PM +0200, Benno Lossin wrote:
> [...]
>> > +declare_and_impl_atomic_methods!(
>> > +    /// Basic atomic operations
>> > +    pub trait AtomicHasBasicOps {
>> 
>> I think we should drop the `Has` from the names. So this one can just be
>> `AtomicBasicOps`. Or how about `BasicAtomic`, or `AtomicBase`?
>> 
>
> Actually, given your feedback to `ordering::Any` vs `core::any::Any`,
> I think it makes more sense to keep the current names ;-) These are only
> trait names to describe what operations do an `AtomicImpl` has, and they
> should be used only in atomic mod, so naming them a bit longer is not a
> problem. And by doing so, we free the better names `BasicAtomic` or
> `AtomicBase` for other future usages.
>
> Best I could do is `AtomicBasicOps` or `HasAtomicBasicOps`.

But you are already in the `ops` namespace, so by your argument you
could just use `ops::BasicAtomic` :)

I'm fine with `AtomicBasicOps`.

>> > +declare_and_impl_atomic_methods!(
>> > +    /// Atomic arithmetic operations
>> > +    pub trait AtomicHasArithmeticOps {
>> 
>> Forgot to rename this one to `Add`? I think `AtomicAdd` sounds best for
>
> No, because at the `AtomicImpl` level, it's easy to know whether a type
> has all the arithmetic operations or none (also the `Delta` type should
> be known). But I don't have opinions on renaming it to `AtomicAddOps` or
> `HasAtomicAddOps`.

Ahh right yeah this makes sense. So let's use `AtomicArithmeticOps` if
you insist on the `Ops` part.

---
Cheers,
Benno