From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2C90BCD3439 for ; Wed, 6 May 2026 21:52:12 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 990AF10EEB8; Wed, 6 May 2026 21:52:11 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="alPIjzJn"; dkim-atps=neutral Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by gabe.freedesktop.org (Postfix) with ESMTPS id C53EC10EEB8 for ; Wed, 6 May 2026 21:52:09 +0000 (UTC) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 49C0F6013B; Wed, 6 May 2026 21:52:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B44E5C2BCB0; Wed, 6 May 2026 21:52:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778104329; bh=65oXQ5dRDyn6R/I5J2GVV5AhZXrpJwtI039sm97wFnA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=alPIjzJnnLxZxj29Xga2dbUcgu56hG9l4FCeYpl8Ai4wUAhOFarKeAjgmmClxyFr+ VtoV7qhGLx0FZdixxfQjyJws6nXYDi+fIEPBypTPna7ivMpUAjNKHyd3ryIbuGI0ET 0WJml/BikgrO3E7NqldEv28tWSQKAQomjP4Yfth2KBv0FGujgh+fcmV47AKCKF1xIK 5283l6TDvLMZ1vumA8RIZl4jzPA93uK4t5Zo7ENV3dkU62VuMNJAHjNXSl+11ET5ZQ kINuExF25ZhakSKXNQTNNXnZtowYciFPTe3//hjD1w73IN54i8JT8v84ooqtN9ss4D B7HGlJPOQeJvQ== From: Danilo Krummrich To: gregkh@linuxfoundation.org, rafael@kernel.org, acourbot@nvidia.com, aliceryhl@google.com, david.m.ertman@intel.com, ira.weiny@intel.com, leon@kernel.org, viresh.kumar@linaro.org, m.wilczynski@samsung.com, ukleinek@kernel.org, bhelgaas@google.com, kwilczynski@kernel.org, abdiel.janulgue@gmail.com, robin.murphy@arm.com, markus.probst@posteo.de, ojeda@kernel.org, boqun@kernel.org, gary@garyguo.net, bjorn3_gh@protonmail.com, lossin@kernel.org, a.hindborg@kernel.org, tmgross@umich.edu, igor.korotin@linux.dev, daniel.almeida@collabora.com Cc: driver-core@lists.linux.dev, linux-kernel@vger.kernel.org, nova-gpu@lists.linux.dev, dri-devel@lists.freedesktop.org, linux-pm@vger.kernel.org, linux-pwm@vger.kernel.org, linux-pci@vger.kernel.org, rust-for-linux@vger.kernel.org, Danilo Krummrich Subject: [PATCH v2 07/25] rust: auxiliary: implement Sync for Device Date: Wed, 6 May 2026 23:50:43 +0200 Message-ID: <20260506215113.851360-8-dakr@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260506215113.851360-1-dakr@kernel.org> References: <20260506215113.851360-1-dakr@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Device uses the same underlying struct auxiliary_device as Device; Bound is a zero-sized type-state marker that does not affect thread safety. This is needed for drivers to store &'bound auxiliary::Device in their HRT private data while remaining Send. Signed-off-by: Danilo Krummrich --- rust/kernel/auxiliary.rs | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/rust/kernel/auxiliary.rs b/rust/kernel/auxiliary.rs index 37690fa14891..e193ba5b7167 100644 --- a/rust/kernel/auxiliary.rs +++ b/rust/kernel/auxiliary.rs @@ -366,6 +366,10 @@ unsafe impl Send for Device {} // (i.e. `Device) are thread safe. unsafe impl Sync for Device {} +// SAFETY: Same as `Device` -- the underlying `struct auxiliary_device` is the same; +// `Bound` is a zero-sized type-state marker that does not affect thread safety. +unsafe impl Sync for Device {} + /// Wrapper that stores a [`TypeId`] alongside the registration data for runtime type checking. #[repr(C)] #[pin_data] -- 2.54.0