From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3454831F98E; Thu, 21 May 2026 23:40:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779406816; cv=none; b=bVId08gCfSBDTMLHLGVpAQn/iEXkK7hLvgSymj49yDyTIUy/HsntgXO1ygAjSNd5MFDKQvHdtHoEhn16stSuepf3aYk1n+b2DjILt6juDTTRKKAumxYPCUfBL6S7zMISf8pMFZoeguYWKinNrwJSpkjWvbWWj2YcVKvHEeSpM7o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779406816; c=relaxed/simple; bh=MQaVY3wn5Fr9Ki7syMwZESRCGHvN5F5kTZE869GysQc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=obwnz0U1002/M90aN1Jae1VC8B+l0r0sQc2LJyt+Bnwnj1GY/03Ze77E8SADd+wahoh8qaJjVUCu+2ZAJMaKDSugtANYi459KPSeC6Nem2Fx03uIrBUcraSNwlVW7yoeseJ1gGmZPiIBScLma/7mTTjCakDcmWJ58FB6UXL1zEQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NRztFjac; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="NRztFjac" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 52B531F000E9; Thu, 21 May 2026 23:40:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1779406807; bh=ZhrVRWnv8zNdxXcPSXmUKIJuAuNCE6ADfKvZitNDWSY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=NRztFjacPD5/OZIzlRctcJhFSCoVS8vrrtffhaKXdEOrFCj6CHm3C75ntBkDGQ799 xm9dUNxesoukHHbiIEatxULSbbMrslyqWAu8qItUGWxu34th1NP3nF8QPW8KJSYZx1 +M3y91d5/7ufqBNSO7fVsl4c15Toukv76GXuJQijBKTaWLKnSTGsq7WODnCR1XXkka YqgeIa8LK/KuUt5u+rJGWpXnyy3UyvFTNx8cHiTo6VqxR4Vq8ZuWoeuR3kYa9nXLK6 5NppZmRhG+CZo6XJv+eHIlL//GPbxqmWZ+vxjlmsttWwoLOBHFn1npbcx9T/GaMUz6 WKdylY3qxs3Qg== 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, pcolberg@redhat.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 v4 07/27] rust: auxiliary: implement Sync for Device Date: Fri, 22 May 2026 01:34:33 +0200 Message-ID: <20260521233501.1191842-8-dakr@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260521233501.1191842-1-dakr@kernel.org> References: <20260521233501.1191842-1-dakr@kernel.org> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Implement Sync for Device in addition to Device. 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 private data while remaining Send. Reviewed-by: Alexandre Courbot Reviewed-by: Gary Guo 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 4e83f9e27d78..df2c97423dcc 100644 --- a/rust/kernel/auxiliary.rs +++ b/rust/kernel/auxiliary.rs @@ -369,6 +369,10 @@ 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