From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 28EF913D539; Sun, 17 May 2026 00:03:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778976186; cv=none; b=s92lufAA4643GzyMOOIcYDHAttmjQTDiN1PhYfOMdh+KLF/ZxJo2Rbp1MnUMsHeCsJe3ax+ODcnHlIVw+7xtJ8EtkGuKrD65fq9v3tY97iBFxkE86PTEqT4PSJsk25UWpD6xvsmU5JBG5G3ieoiR6CF/TvuaKvloiMiaUFLWxVU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778976186; c=relaxed/simple; bh=jphP3iS4bUVeKEZrR/3bcGO0WxPTi/VkZDmtfppmxw4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gNGNHJoYAOHYCrRCD0CzpcUz7uSTJ/ijyRokuavcn5EZ0RuSbMlXbIvB9Ced+phMi7UqhPX/rxBhsQO2KVfiyKtoYdAm8LvbftOxnbp4tbaK8Bz3L2wdIkZRP0JW1fMuy0CnODZtTKKB2DiJmOlflsbVPKyggQ9R2YkOB5ffRh0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=G3LjH1YK; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="G3LjH1YK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9543CC2BCB7; Sun, 17 May 2026 00:02:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778976186; bh=jphP3iS4bUVeKEZrR/3bcGO0WxPTi/VkZDmtfppmxw4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=G3LjH1YKfqYP+sOnxZ+AGkVNcJmO0PNV6BhZPOqXy+S0X7U8h3Dd6MReAXOAksZ5L NgE/OwWsPNSC8F/jAhyNRCL3/XslzGQpf4Tu3ICjUYDaQDPAW/3g3zKblScaqyz25P eEN/LRIP70aW0O5c2R473huuAWbF7B7UiFi9vAs1su/+BD0v7rgD4zidNVG9k7cON5 byrAM0it+O6PnIT1OXWs0FyGym3pSkddsITbmtRNPiAtYceVwRpNgBB6Uu47lphhVc ev6mDRsgr7AAK6QwpcL0IBjWfLX2+zvqbYJ0Yy6BH6YiLiYxC1m7VDlLNkrnCc8bS/ Lb08GJfIzHPMw== 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 v3 09/27] rust: device: implement Sync for Device Date: Sun, 17 May 2026 02:00:57 +0200 Message-ID: <20260517000149.3226762-10-dakr@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260517000149.3226762-1-dakr@kernel.org> References: <20260517000149.3226762-1-dakr@kernel.org> Precedence: bulk X-Mailing-List: driver-core@lists.linux.dev 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 device as Device; Bound is a zero-sized type-state marker that does not affect thread safety. This is needed for types that hold &'bound Device, such as io::mem::IoMem, to be Send. Signed-off-by: Danilo Krummrich --- rust/kernel/device.rs | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/rust/kernel/device.rs b/rust/kernel/device.rs index 5df8fa108a52..c4486f4b8c40 100644 --- a/rust/kernel/device.rs +++ b/rust/kernel/device.rs @@ -467,6 +467,10 @@ unsafe impl Send for Device {} // synchronization in `struct device`. unsafe impl Sync for Device {} +// SAFETY: Same as `Device` -- the underlying `struct device` is the same; `Bound` is a +// zero-sized type-state marker that does not affect thread safety. +unsafe impl Sync for Device {} + /// Marker trait for the context or scope of a bus specific device. /// /// [`DeviceContext`] is a marker trait for types representing the context of a bus specific -- 2.54.0