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[103.168.172.201]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8901d0dcd77sm32590396d6.42.2025.12.29.03.27.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Dec 2025 03:27:27 -0800 (PST) Received: from phl-compute-05.internal (phl-compute-05.internal [10.202.2.45]) by mailfauth.phl.internal (Postfix) with ESMTP id D3D19F40073; Mon, 29 Dec 2025 06:27:26 -0500 (EST) Received: from phl-frontend-03 ([10.202.2.162]) by phl-compute-05.internal (MEProxy); Mon, 29 Dec 2025 06:27:26 -0500 X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeefgedrtddtgdejjedtvdcutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpuffrtefokffrpgfnqfghnecuuegr ihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjug hrpeffhffvvefukfhfgggtuggjsehttdertddttddvnecuhfhrohhmpeeuohhquhhnucfh vghnghcuoegsohhquhhnrdhfvghnghesghhmrghilhdrtghomheqnecuggftrfgrthhtvg hrnhephedugfduffffteeutddvheeuveelvdfhleelieevtdeguefhgeeuveeiudffiedv necuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomhepsghoqh hunhdomhgvshhmthhprghuthhhphgvrhhsohhnrghlihhthidqieelvdeghedtieegqddu jeejkeehheehvddqsghoqhhunhdrfhgvnhhgpeepghhmrghilhdrtghomhesfhhigihmvg drnhgrmhgvpdhnsggprhgtphhtthhopedufedpmhhouggvpehsmhhtphhouhhtpdhrtghp thhtohepfhhujhhithgrrdhtohhmohhnohhrihesghhmrghilhdrtghomhdprhgtphhtth hopehojhgvuggrsehkvghrnhgvlhdrohhrghdprhgtphhtthhopegrrdhhihhnuggsohhr gheskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheprghlihgtvghrhihhlhesghhoohhglh gvrdgtohhmpdhrtghpthhtohepsghjohhrnhefpghghhesphhrohhtohhnmhgrihhlrdgt ohhmpdhrtghpthhtohepuggrkhhrsehkvghrnhgvlhdrohhrghdprhgtphhtthhopehgrg hrhiesghgrrhihghhuohdrnhgvthdprhgtphhtthhopehlohhsshhinheskhgvrhhnvghl rdhorhhgpdhrtghpthhtohepthhmghhrohhsshesuhhmihgthhdrvgguuh X-ME-Proxy: Feedback-ID: iad51458e:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Mon, 29 Dec 2025 06:27:25 -0500 (EST) Date: Mon, 29 Dec 2025 19:27:12 +0800 From: Boqun Feng To: FUJITA Tomonori Cc: ojeda@kernel.org, a.hindborg@kernel.org, aliceryhl@google.com, bjorn3_gh@protonmail.com, dakr@kernel.org, gary@garyguo.net, lossin@kernel.org, tmgross@umich.edu, acourbot@nvidia.com, rust-for-linux@vger.kernel.org, linux-arch@vger.kernel.org Subject: Re: [PATCH v1 0/4] rust: Add i8/i16 atomic try_cmpxchg helpers Message-ID: References: <20251227115951.1424458-1-fujita.tomonori@gmail.com> Precedence: bulk X-Mailing-List: linux-arch@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251227115951.1424458-1-fujita.tomonori@gmail.com> On Sat, Dec 27, 2025 at 08:59:47PM +0900, FUJITA Tomonori wrote: > This series adds Rust helpers for atomic try_cmpxchg on i8/i16 with > full, acquire, release, and relaxed orderings in preparation for > supporting Rust-side cmpxchg on those types. > > Rust atomic cmpxchg is implemented on top of the kernel C APIs, > try_cmpxchg. > > On architectures that support Rust today, the kernel already provides > try_cmpxchg implementations that work for i8/i16, using > architecture-specific instructions. > > Tested on QEMU (86_64, arm64, riscv, loongarch, and armv7). > > Follow-up patches will add Rust users of these helpers. > > Boqun, feel free to drop the ordering-related notes from each patch. > Queued, thanks! Regards, Boqun > FUJITA Tomonori (4): > rust: helpers: Add i8/i16 atomic try_cmpxchg helpers > rust: helpers: Add i8/i16 atomic try_cmpxchg_acquire helpers > rust: helpers: Add i8/i16 atomic try_cmpxchg_release helpers > rust: helpers: Add i8/i16 atomic try_cmpxchg_relaxed helpers > > rust/helpers/atomic_ext.c | 40 +++++++++++++++++++++++++++++++++++++++ > 1 file changed, 40 insertions(+) > > > base-commit: 30f5de001fb2ffacdb61e82c8626cae2d68b4d03 > -- > 2.43.0 >