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[180.34.120.7]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2985c2beb34sm87059105ad.76.2025.11.15.05.23.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 15 Nov 2025 05:23:35 -0800 (PST) Date: Sat, 15 Nov 2025 22:23:24 +0900 (JST) Message-Id: <20251115.222324.673595697251044200.fujita.tomonori@gmail.com> To: boqun.feng@gmail.com Cc: fujita.tomonori@gmail.com, ojeda@kernel.org, alex.gaynor@gmail.com, peterz@infradead.org, will@kernel.org, a.hindborg@kernel.org, aliceryhl@google.com, bjorn3_gh@protonmail.com, dakr@kernel.org, gary@garyguo.net, lossin@kernel.org, mark.rutland@arm.com, rust-for-linux@vger.kernel.org, tmgross@umich.edu Subject: Re: [PATCH v1 1/3] rust: sync: Add smp_store_release/smp_load_acquire helpers From: FUJITA Tomonori In-Reply-To: References: <20251115.152220.488086212368718494.fujita.tomonori@gmail.com> Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit On Fri, 14 Nov 2025 23:01:33 -0800 Boqun Feng wrote: >> Do you mean that I should remove the VolatileOps trait and implement >> AtomicBasicOps for i8/i16 using a dedicated macro like >> impl_only_atomic_load_and_store_ops? > > Right, I would want to avoid to use write_volatile() and read_volatile() > directly as atomic operations, but rather we implement > atomic_*_{load,store}() with WRITE_ONCE() and READ_ONCE(), and then Rust > code call them. In this way we keep our kernel memory model bits on the > C side. Sounds good, will do in v2.