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Wed, 15 Jan 2025 14:25:06 +0000 Message-ID: Date: Wed, 15 Jan 2025 15:24:59 +0100 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next v2 01/11] net: add netdev_lock() / netdev_unlock() helpers To: Jakub Kicinski , Ido Schimmel CC: , , , , , , , , References: <20250115035319.559603-1-kuba@kernel.org> <20250115035319.559603-2-kuba@kernel.org> <20250115060853.0f592332@kernel.org> Content-Language: en-US From: Przemek Kitszel In-Reply-To: <20250115060853.0f592332@kernel.org> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: MI0P293CA0006.ITAP293.PROD.OUTLOOK.COM (2603:10a6:290:44::17) To MN6PR11MB8102.namprd11.prod.outlook.com (2603:10b6:208:46d::9) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MN6PR11MB8102:EE_|SJ1PR11MB6203:EE_ X-MS-Office365-Filtering-Correlation-Id: eb457680-0fbd-4a99-e22c-08dd357068b3 X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|1800799024|7416014; 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>>> >>> /** >>> - * @lock: protects @net_shaper_hierarchy, feel free to use for other >>> - * netdev-scope protection. Ordering: take after rtnl_lock. >>> + * @lock: netdev-scope lock, protects a small selection of fields. >>> + * Should always be taken using netdev_lock() / netdev_unlock() helpers. >>> + * Drivers are free to use it for other protection. >> >> As with devl_lock(), would be good to specify the ordering for those who >> happen to take both. My guess is that devl_lock() is after netdev_lock() > > The ordering is transitive, since devl_ is before rtnl_ there is > no ambiguity. Or so I think :) > sure thing, sorry for not checking prior to asking :) thanks to both you and Ido for answering!