Re: [PATCH 2/2] rust: sync: atomic: Add atomic operation helpers over raw pointers

[Alice Ryhl <aliceryhl@google.com>]

On Tue, Jan 20, 2026 at 07:52:07PM +0800, Boqun Feng wrote:
> In order to synchronize with C or external, atomic operations over raw
> pointers, althought previously there is always an `Atomic::from_ptr()`
> to provide a `&Atomic<T>`. However it's more convenient to have helpers
> that directly perform atomic operations on raw pointers. Hence a few are
> added, which are basically a `Atomic::from_ptr().op()` wrapper.
> 
> Note: for naming, since `atomic_xchg()` and `atomic_cmpxchg()` has a
> conflict naming to 32bit C atomic xchg/cmpxchg, hence they are just
> named as `xchg()` and `cmpxchg()`. For `atomic_load()` and
> `atomic_store()`, their 32bit C counterparts are `atomic_read()` and
> `atomic_set()`, so keep the `atomic_` prefix.
> 
> Signed-off-by: Boqun Feng <boqun.feng@gmail.com>

Reviewed-by: Alice Ryhl <aliceryhl@google.com>

> +/// - `atomic_store(.., Relaxed)` maps to `WRITE_ONCE()` when using for inter-thread communication.

typo: "when used for"

Alice