{"id":2229237,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2229237/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pwm/patch/20260427221155.2144848-11-dakr@kernel.org/","project":{"id":38,"url":"http://patchwork.ozlabs.org/api/1.1/projects/38/?format=json","name":"Linux PWM development","link_name":"linux-pwm","list_id":"linux-pwm.vger.kernel.org","list_email":"linux-pwm@vger.kernel.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260427221155.2144848-11-dakr@kernel.org>","date":"2026-04-27T22:11:08","name":"[10/24] rust: device: implement Sync for Device","commit_ref":null,"pull_url":null,"state":"handled-elsewhere","archived":false,"hash":"cf1193fb7df161ed567b43299ba9180ff03471d9","submitter":{"id":89037,"url":"http://patchwork.ozlabs.org/api/1.1/people/89037/?format=json","name":"Danilo Krummrich","email":"dakr@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-pwm/patch/20260427221155.2144848-11-dakr@kernel.org/mbox/","series":[{"id":501734,"url":"http://patchwork.ozlabs.org/api/1.1/series/501734/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pwm/list/?series=501734","date":"2026-04-27T22:10:58","name":"rust: device: Higher-Ranked Lifetime Types for device drivers","version":1,"mbox":"http://patchwork.ozlabs.org/series/501734/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2229237/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2229237/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-pwm@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=Tpxe20+p;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.234.253.10; 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a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1777327991; cv=none;\n b=tgpjHCQW8JG0zIVBC3V1bLcZPGL0r5pfNazvqoOLty1IN44cAkHgAh9nXVMiKCASIB6K+tLd7oKg/c9cXw/4eNJoTe6YW2CbYCOw6VsgasFQHOIaPpeItPDByi0Sl3L392eH/e9ReLDuA7bmgSnwRPv4DDKRVh+Yzr6OF10JS2Y=","ARC-Message-Signature":"i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1777327991; c=relaxed/simple;\n\tbh=auHxUUsQH6YXhhsoPM2i0zRThcG3GjhIs2ycbNDnDEE=;\n\th=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version;\n b=fcpzTJjc0vllHVnD3vfbHO05mJZY+R4wAOa238REEcYA5ZhHJiLaTqFcG7lD+xaGWOC7j+ac6ExAZ2huSpMW6MsK7Wzby+3dBFinT+7yguaqDkjkv0AaqG/C/bKmHvDvCE2KRYvuBR9Ikx9wHZNOnodUvl2YFLzdpONfWxqIuYk=","ARC-Authentication-Results":"i=1; smtp.subspace.kernel.org;\n dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.b=Tpxe20+p; arc=none smtp.client-ip=10.30.226.201","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1777327991;\n\tbh=auHxUUsQH6YXhhsoPM2i0zRThcG3GjhIs2ycbNDnDEE=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=Tpxe20+pywFn3Tok0SQvaoZWh+7phDXK2kLMxayygbnAbIGpo4k5r99nyg4ok/TJ/\n\t SBrRKriatJkTg+0/rNlGho/QEAN0URtpVftUITiFgz2PeDEoV+PZVNxNFH1xG+PPeM\n\t 2l938aLVge8Y5kYhVxsdNslPc7pfluaqm1oARKGxJQluXP7FWJVv8KXlEF6MARCVK0\n\t R03bksZMeUO14VT8jFy1rBybwQBp4DWLGX+z2POqWWcfj3J6li5f2ak6K9SenC1p3N\n\t 7DnNU0RItI+Fs6iuvcc1ndUxyHPK59ARQzj2B906M/KbqDQOr7YNNJf236NiaDcESF\n\t hqZrZA6jz778g==","From":"Danilo Krummrich ","To":"gregkh@linuxfoundation.org,\n\trafael@kernel.org,\n\tacourbot@nvidia.com,\n\taliceryhl@google.com,\n\tdavid.m.ertman@intel.com,\n\tira.weiny@intel.com,\n\tleon@kernel.org,\n\tviresh.kumar@linaro.org,\n\tm.wilczynski@samsung.com,\n\tukleinek@kernel.org,\n\tbhelgaas@google.com,\n\tkwilczynski@kernel.org,\n\tabdiel.janulgue@gmail.com,\n\trobin.murphy@arm.com,\n\tmarkus.probst@posteo.de,\n\tojeda@kernel.org,\n\tboqun@kernel.org,\n\tgary@garyguo.net,\n\tbjorn3_gh@protonmail.com,\n\tlossin@kernel.org,\n\ta.hindborg@kernel.org,\n\ttmgross@umich.edu","Cc":"driver-core@lists.linux.dev,\n\tlinux-kernel@vger.kernel.org,\n\tnova-gpu@lists.linux.dev,\n\tdri-devel@lists.freedesktop.org,\n\tlinux-pm@vger.kernel.org,\n\tlinux-pwm@vger.kernel.org,\n\tlinux-pci@vger.kernel.org,\n\trust-for-linux@vger.kernel.org,\n\tDanilo Krummrich ","Subject":"[PATCH 10/24] rust: device: implement Sync for Device","Date":"Tue, 28 Apr 2026 00:11:08 +0200","Message-ID":"<20260427221155.2144848-11-dakr@kernel.org>","X-Mailer":"git-send-email 2.54.0","In-Reply-To":"<20260427221155.2144848-1-dakr@kernel.org>","References":"<20260427221155.2144848-1-dakr@kernel.org>","Precedence":"bulk","X-Mailing-List":"linux-pwm@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit"},"content":"The underlying `struct device` is the same for all device contexts;\n`Bound` is a zero-sized type-state marker that does not affect thread\nsafety. Implement `Sync` for `Device` with the same safety\nargument as the existing `Device` implementation.\n\nThis is needed for types that hold `&'a Device`, such as\n`io::mem::IoMem`, to be `Send`.\n\nSigned-off-by: Danilo Krummrich \n---\n rust/kernel/device.rs | 4 ++++\n 1 file changed, 4 insertions(+)","diff":"diff --git a/rust/kernel/device.rs b/rust/kernel/device.rs\nindex 09cbe8a438a9..b330b87178d3 100644\n--- a/rust/kernel/device.rs\n+++ b/rust/kernel/device.rs\n@@ -503,6 +503,10 @@ unsafe impl Send for Device {}\n // synchronization in `struct device`.\n unsafe impl Sync for Device {}\n \n+// SAFETY: Same as `Device` -- the underlying `struct device` is the same; `Bound` is a\n+// zero-sized type-state marker that does not affect thread safety.\n+unsafe impl Sync for Device {}\n+\n /// Marker trait for the context or scope of a bus specific device.\n ///\n /// [`DeviceContext`] is a marker trait for types representing the context of a bus specific\n","prefixes":["10/24"]}