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Howlett" , linux-kernel@vger.kernel.org, driver-core@lists.linux.dev, maple-tree@lists.infradead.org, asahi@lists.linux.dev, linux-mm@kvack.org Subject: Re: [PATCH v3 1/2] regmap: Remove debugfs before cache teardown Message-ID: References: <20261006-regcache-lifecycle-submit-v3-0-37bdd82fd47c@gmail.com> <20261006-regcache-lifecycle-submit-v3-1-37bdd82fd47c@gmail.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261006-regcache-lifecycle-submit-v3-1-37bdd82fd47c@gmail.com> X-ClientProxiedBy: SG2P153CA0026.APCP153.PROD.OUTLOOK.COM (2603:1096:4:c7::13) To AM8PR04MB7874.eurprd04.prod.outlook.com (2603:10a6:20b:24d::9) Precedence: bulk X-Mailing-List: asahi@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM8PR04MB7874:EE_|PA4PR04MB9365:EE_ X-MS-Office365-Filtering-Correlation-Id: c86168a0-7aa3-4c2e-138d-08df2528cd5b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|19092799006|376014|366016|23010399003|7416014|18002099003|22082099003|4143699003|6133799003|10067099003|56012099006|11063799006; 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A concurrent debugfs cache operation can therefore >access cache state after the backend exit callback starts freeing it. > >Remove debugfs before cache teardown, and clear the debugfs pointer after >removal. During cache reinitialization, recreate debugfs only after the >new cache initializes successfully. > >Signed-off-by: Michael Reeves Reviewed-by: Peng Fan