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 7C8B28F7D; Sun, 17 May 2026 00:02:59 +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=1778976179; cv=none; b=Wktkrje/TkQ7vozYEjnUyZPkBLmmno004ZWoM/wxniq8FPeMxsobl1QnOnjn17xjs1ERn2e3PcCGa5RwvDT8sn2HgDPiQQEEpXRSMyL8+ydErelvETRrpvvGPYweB1lOb21comKfRCHoBaEQpTbWPGtowD8l33OdnFX3kaHHoYA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778976179; c=relaxed/simple; bh=vXBZ1m+8fysk721VWrgfvyV1v4yI6K/pK98VLh+Wlco=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=T1OyUE1LY8E5mpIF4EfYGSIqC8Etf7QC/AsPA0UmN4ND566JxyMGEsX9twQ68ncQEqGymOhaA41sD2lCABux3G2BwtsEmMZpxtjcuJjxrsmuMDt6aZbvmo3v4BB1zJWUF7Y0NxgkoxoIy5Ka0M7v1h4HCHojVcl1XOE01gvrHG4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OcZfSi2j; 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="OcZfSi2j" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C6871C19425; Sun, 17 May 2026 00:02:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778976179; bh=vXBZ1m+8fysk721VWrgfvyV1v4yI6K/pK98VLh+Wlco=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OcZfSi2juglBQgiPDzvd8Y9vFF9b0j1CHTbtFRM+1cmsSHadDL+b7mRVISYOcqN7e SCyGT9kzSZU99y3ETrGRjPfGRicHi3fpwBpubVTgjlpmTPePVIYSPPJMGLheaYO6lY T7UFcah28h4dlS7iCwbKus7uAez2fkkMz8+wKZQx6qFz7Yk1tZHVmCsTeJlbvn6+gx aKMAEbMlBgj36ZBv8XO2lIMoxgOhPmIMCQKS5MY/hdbVZ8G4oJFtrK3q92m3rt0MQM 9O7Pc99PXTTWyO3+6S4MUnV/Tkq54+gHBdzvDZNXXWSZG8QSEnGGa/1Pq/gWHlJUiZ pSRrnTUVwbGhg== 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 08/27] rust: usb: implement Sync for Device Date: Sun, 17 May 2026 02:00:56 +0200 Message-ID: <20260517000149.3226762-9-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 usb_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 usb::Device in their private data while remaining Send. Signed-off-by: Danilo Krummrich --- rust/kernel/usb.rs | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/rust/kernel/usb.rs b/rust/kernel/usb.rs index 794abe06f5bd..995221d327b8 100644 --- a/rust/kernel/usb.rs +++ b/rust/kernel/usb.rs @@ -468,6 +468,10 @@ unsafe impl Send for Device {} // allow any mutation through a shared reference. unsafe impl Sync for Device {} +// SAFETY: Same as `Device` -- the underlying `struct usb_device` is the same; +// `Bound` is a zero-sized type-state marker that does not affect thread safety. +unsafe impl Sync for Device {} + /// Declares a kernel module that exposes a single USB driver. /// /// # Examples -- 2.54.0