linux-kernel - Re: [PATCH v5 08/10] rust: sync: atomic: Add Atomic<{usize,isize}>

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Message-ID: <87frfmzmzg.fsf@kernel.org>
Date: Thu, 26 Jun 2025 14:49:39 +0200
From: Andreas Hindborg <a.hindborg@...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>,  "Benno
 Lossin" <lossin@...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>
Subject: Re: [PATCH v5 08/10] rust: sync: atomic: Add Atomic<{usize,isize}>

"Boqun Feng" <boqun.feng@...il.com> writes:

> Add generic atomic support for `usize` and `isize`. Note that instead of
> mapping directly to `atomic_long_t`, the represention type
> (`AllowAtomic::Repr`) is selected based on CONFIG_64BIT. This reduces
> the necessarity of creating `atomic_long_*` helpers, which could save
> the binary size of kernel if inline helpers are not available.
>
> Signed-off-by: Boqun Feng <boqun.feng@...il.com>

Reviewed-by: Andreas Hindborg <a.hindborg@...nel.org>

Best regards,
Andreas Hindborg