From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 04451D2ED0A for ; Wed, 1 Apr 2026 13:44:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:MIME-Version:In-Reply-To: References:To:From:Subject:Cc:Message-Id:Date:Content-Type: Content-Transfer-Encoding:Reply-To:Content-ID:Content-Description:Resent-Date :Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=TjRn4EzOh7HkP7tfYe2eSZejWt9ikfWqt3074xu5+kc=; b=AohAe16ONpXffx8q/AnNBFs+13 QMgV/NjBaHpSNwN6Vks6rUzAI65oAMu7Ptg5b8/sXf+kFDWkTUkW4s8vyHH24WsEN5CKba+nJIVAV 0gAoHxSTfBZJGjx0WLOeXmXUUReftALKsuHhNLw0SdGfV4Mo/K3TPpMMRyiujpjZpllLFnEqNXDan iUXGM8ZYXPmaFn3AK4G04QCZKc9oahgLRmqqRDd+A1zhHUzoRck4qunNWpGGM892mHQFKe1GVQZZc VDHg3NX+6w9+a8Xzp78xLtfOlzLQxBdz/eH6gV+OU3NR2GIDtzuOpnfQ7OKWp4HxRnty3Gpcxxx1U Fhkvjtyg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7vrh-0000000FLbw-0aF7; Wed, 01 Apr 2026 13:44:13 +0000 Received: from mail-ukwestazlp170110003.outbound.protection.outlook.com ([2a01:111:f403:c206::3] helo=CWXP265CU009.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7vrf-0000000FLb6-13io; Wed, 01 Apr 2026 13:44:12 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=Nmm2x4HpWC8bXMReExX6oLjACA+Ntwkmzfw3uI3z4+txNe9s27Ph6vlMqKpAk3IgBh51eWjtrYd9GU22DX5bBxgiNjb8YqCtmKUaQ6XdVpaXI1LdInXzEAHXmTEMMJq0M0Wp77LnhBzokCHe8zEVNfK7R0yI4fQ7mxRKqrdR8IedUVMawrooEciTbAh2pFS1YtkAKYaHzSVftLOgRC3pOyRvG1OwpaGYq5mK5OLaFah/2wKZ41q5I7WGiPH+o6d+7hBDD6jLD19wphYsRnCfGcfypd9wd6FQ1vKMB8dufMY70/PPAWz43UqNcsV7XCOIkvf56HDxM5M9a9XzC1/RKg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=TjRn4EzOh7HkP7tfYe2eSZejWt9ikfWqt3074xu5+kc=; b=phvsLXqkDiYRpB0j9AcIZ0eWZo8zY+X3P+vNiOz19COmEvoyiK9HFa1XsYE+fCiv9SQDiNIxjieEceDyQesn9wVESlwSPXyPTF00je+SDeZxpxFm7QZxvG/Mey+Tt7quOeoVbajBTKG2nhIBbj5V91zk9MmjBwiIPZ4ysUBb5kmzUbieH6Cp1zwPp/XxE22ZAEdWtCPG2ifRRN6vmeF1n0poWe8CbH4Kn7437xTBoe5mdjUeihF2qyEFxBWpsEj/n5q6eFSWMglLxBkipkHfJYJYb+X7N9DZmK8XaJbkpbr132pHemSYfF8C0oFZnCPyZkNgrYmRZnXwJBoCu4iruQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=garyguo.net; dmarc=pass action=none header.from=garyguo.net; dkim=pass header.d=garyguo.net; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=garyguo.net; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=TjRn4EzOh7HkP7tfYe2eSZejWt9ikfWqt3074xu5+kc=; b=FoFDH+k356z7LfNUDRMDzJYA9rZWq0PnRcZpIAHiDLUXomGrvYvoFTviVhhW//ycOqqNGzSzQT2ZHTyUJqcrZAyy1dg6QkhQjcQeOpf340cYGaVKTOcSXGEioDpEqX7xGstKZYCrGz4oI9/sRe0aZSpdi/Ea5mRQ8SNCZzPXHEQ= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=garyguo.net; Received: from LOVP265MB8871.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:488::16) by LO8P265MB7687.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:3cb::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9769.17; Wed, 1 Apr 2026 13:44:05 +0000 Received: from LOVP265MB8871.GBRP265.PROD.OUTLOOK.COM ([fe80::1c3:ceba:21b4:9986]) by LOVP265MB8871.GBRP265.PROD.OUTLOOK.COM ([fe80::1c3:ceba:21b4:9986%4]) with mapi id 15.20.9769.014; Wed, 1 Apr 2026 13:44:05 +0000 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Wed, 01 Apr 2026 14:44:04 +0100 Message-Id: Cc: "Boqun Feng" , "Gary Guo" , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , "Benno Lossin" , "Trevor Gross" , , , "Lorenzo Stoakes" , "Vlastimil Babka" , "Liam R . Howlett" , "Uladzislau Rezki" , , "moderated for non-subscribers" , "Alexandre Ghiti" , , , , "Rae Moar" , , , "Nick Desaulniers" , "Bill Wendling" , "Justin Stitt" , , , "Shuah Khan" , Subject: Re: [PATCH 05/33] rust: remove `RUSTC_HAS_COERCE_POINTEE` and simplify code From: "Gary Guo" To: "Miguel Ojeda" , "Nathan Chancellor" , "Nicolas Schier" , "Danilo Krummrich" , "Andreas Hindborg" , "Catalin Marinas" , "Will Deacon" , "Paul Walmsley" , "Palmer Dabbelt" , "Albert Ou" , "Alexandre Courbot" , "David Airlie" , "Simona Vetter" , "Brendan Higgins" , "David Gow" , "Greg Kroah-Hartman" , =?utf-8?q?Arve_Hj=C3=B8nnev=C3=A5g?= , "Todd Kjos" , "Christian Brauner" , "Carlos Llamas" , "Alice Ryhl" , "Jonathan Corbet" X-Mailer: aerc 0.21.0 References: <20260401114540.30108-1-ojeda@kernel.org> <20260401114540.30108-6-ojeda@kernel.org> In-Reply-To: <20260401114540.30108-6-ojeda@kernel.org> X-ClientProxiedBy: LO4P302CA0044.GBRP302.PROD.OUTLOOK.COM (2603:10a6:600:317::10) To LOVP265MB8871.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:488::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LOVP265MB8871:EE_|LO8P265MB7687:EE_ X-MS-Office365-Filtering-Correlation-Id: 5643830c-c5d4-44af-47a2-08de8ff4bdec X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|10070799003|1800799024|376014|7416014|921020|56012099003|18002099003|22082099003; X-Microsoft-Antispam-Message-Info: v21NZrSrfvtq2tcr7x4HQBrB6EAbPyv5yNXUMUUXLUimWS/+upcNjwGfL5Dsxd0vvD71wkTdSXl6/ezI4FdKUlfmBDS5eTViQTrbEwYEIVA01pc9wN+u2Aisgufy295DR3N4ICbA13AUGTCDn3GB1gm8HkNrgxVe9pF6b3Tj9q7cN87BHpH7z4zuTPFjdLCyFxvMRzYHr5qDGNvKMQ2A9ik2guoNs39R4PoOXpdeuQ+atOOQHvuLO+ZjPR9QM8KPBymDUbaPi/ZEwm2sj/BQv16U/0gsPkUsIMC686pB7+zzArCzFXNzZLeEaR75EEN/2DUYlyVZBXtAHGhSIxPeo49BHAicparsLOAmJKGLCagU98NZMLwvBeCMmXsvVrLHns/bKF0HRmBUVMT3mzipbShPPK/ZK6Hj4qXeTT5PS7qXupv7UYbDDEb/sMwa/CNYXMntG9RgDjpURLQG3qLJat8XOOT2P2XKfFivv7OxKUCjQIwvlAGAe38zV6+UTrzfpxjuhLGHN7x2tKBd316D4UhkN2a/mUMcwO6fmU9ubVbaq3t/B+qfAG9PPuTbZysL/rqF9ZZs1l7N/mCRYJE+ZVolfhzNiL1byb+z0djreKW6BXQfzYEwJZ9xn4fHjfFgb9uW9w3rCRAPiY8UGSgBrHNu48elAu0fqyXJgbmEB71sltBCkskckRzZm29rygtfa9Zc0CruWJY8nYNuOV4xNciFN+EilmTTITtDcCd9Wv/RtoH2vfN9ij4+1Zi0qGTAkq7YH6scWeggr9p3IOeWKg== X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:LOVP265MB8871.GBRP265.PROD.OUTLOOK.COM;PTR:;CAT:NONE;SFS:(13230040)(366016)(10070799003)(1800799024)(376014)(7416014)(921020)(56012099003)(18002099003)(22082099003);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?YnV0MTZRSTdPVll0VGJKMW9EMUlPSW9WK0hrWmorTEVxTGJHOG5UZkZGdGI1?= =?utf-8?B?cUhDeUF6NzNkSXZQYWp5VHAyUUJveTlUWTB5SXMxS3RURUFNK255YWhuTXZ3?= =?utf-8?B?ajU2emFYS1JXZWlpT056dGtoUm81ZmthRFdVODhlQVJCZEZKVnR4QlJ4cVJU?= =?utf-8?B?bURmWDRFblZXYjJMai9wVE05MUdGQnB2ckxrNWt1QmgvVUlkYlVGNnpWZDU2?= =?utf-8?B?dFdGSURWRUM3bkdudE5jT2Q0UGtFYjYrNURTSXhnUmxqSGRkSXFJREdTdmFI?= =?utf-8?B?T0FEZnJGZEdGR3pFcGhYQU40ZUVBVlJRK2tZZ05sdTRRaHl3NFpYNkIyMTM1?= =?utf-8?B?SG9GeTJrak5RWU1SZ3VqQitSVlc2WUl2ckp3UFh3WURjSmkyaFRzd01TcWsr?= =?utf-8?B?aTZpM1l5SWdLY1RVRWczaUo3OWhkRGRxdWhXSjk0OTB4VWU4OEFjaWx0Zmls?= =?utf-8?B?d1ZUei9OUHVNNktXVHIwY0RXdEVzTm0rSUZXWExhQ3pUQTdiWGpVNUZhT0tJ?= =?utf-8?B?NHl2Q0U0dG9RYjVueC9vVTdJVkF0NFk1clF4anRYK2RmbzR2WXhEUjZlT01J?= =?utf-8?B?TzFDcm1lZnpiUy9xY1Q2Zkg2UGJ1a21xWTlDbzRrVjgvSjd6VVBkM3BtcDVy?= =?utf-8?B?Z1BmUHQyWitkb0J1eHY3VkV1Vm9XV3hVMStiZ0FFWEZHTUxsMmpMeXNvd2pv?= =?utf-8?B?cnVLalVCVk5vYnQzOXM3N2JmRURuUis1MjU1aDB3OTdxVzRLalhhaDRCQlVk?= =?utf-8?B?MCtGZVRkaG5wSjlPcVowdE1KVGUxR1U2RHc2WUMvNFNWRjBzekNlckM3ZWY5?= =?utf-8?B?R2xJWHB0UStWOGlhbHV2WnpWSjlsUEN6azBNUk1LZnR4Z29GUEY5emJMQSti?= =?utf-8?B?aWlTMkU4R3V5bU82WVlQQXJrd1o3VEc4a1h2cUVab0VDeXJNTmxBcVFUamh5?= =?utf-8?B?SmJNRnYzTmtOdkI1ZjdTZHNpazNIVmVCTC8zdXNPL1dRMjBZU2I1TzM1YTVm?= =?utf-8?B?WWlVZXpTZ0NLQWZYUnFmN0twZmZiU1U2ZExUODBaUHcxU0swMXFCV1I2OE5k?= =?utf-8?B?a3JPL2xnTDMvbWZsc21jbjEzQld1aHFrUG14U1ZCUmhCNzN1ZDJIL2VtN2Z5?= =?utf-8?B?OHk4dDBwZWtVN0o3eFhoVWdPZ2E1ZVFPbG1HMm5sSmRsOGttc3p4Q2t3a0lD?= =?utf-8?B?cys2MTl6eDRmWUMrYS9jdjdIK0NUTytWemkxMW44bk1PSjNMdXRnVWtaLzJV?= =?utf-8?B?dE5pWnZIUXNZUTk5bnBrYWpGdDhaM3o0SmxUdEM2bkZIenk5dmZyYm5zOElB?= =?utf-8?B?TWVlNTgrT01DaVNEYzlTbk9Ba1lDWVcrbE5uNFgzRDBkclJqQjhJZ2J0Z0ha?= =?utf-8?B?YkpmazN3bnpoUEtUQk5kNjdkZ2hScldwb2JzVEE2TEh6ckkzcE1zamR5MlZP?= =?utf-8?B?TTdwMjBPbEZzMDcyOSttcnNyVXNrSUpKaFplUGpjMm9QdnBoMXJQS2RSYUdV?= =?utf-8?B?b1V1NXcxRWEwcWwxZE43SDlzZ1hSNnpsWk9rdDVaVk9MWlFsbzlGMU9JeG56?= =?utf-8?B?WlJwbjdnTzNkdklwRFlIcmMrb2JkdFo4QlRhYk1qYWVVdEg4WkdzUUZqZlJQ?= =?utf-8?B?elNISWlLYVlMYVZMWXZmK2ZsVGFsOVVjNG43Z091Z2hZbS9VM2t0QjYzZHBZ?= =?utf-8?B?dkNERlVBdGtjRmlRQld6Qy9ScmZ5NEc3RHUvMitNYmdTYWhrclJqTUxxcG51?= =?utf-8?B?NDhsUlcxZmlDQTA4eE5YOVBCSnpDRUF2UlJraGVhUDV6S3VKUkpaUVJBcUZ4?= =?utf-8?B?VVFOdmI3bk5SeGh3VkRtSTRXTm9kRkplZmxUTFBMMU5uV1IzTDcvV2NLRmJM?= =?utf-8?B?aDdUaEYvNVlRNGtWdXZlS3B0NHhMZEpOUGVNaEpjUTFRdVdLVm10d29jdlc3?= =?utf-8?B?YmMyd0cxdmNwNkpEWFFJOE1IekZuSERLZ2FWTmdrS3dVWnpNblByWmsyTE8w?= =?utf-8?B?b2kyaWl1YkxFZ1J3ZkMyTzBraDVucW80aWUrQk5Uak1rcGRrMVpFeG5lM0ZY?= =?utf-8?B?SjVYd2VtejI1aStxNkdLa1ZyWGxVY2svTzczNXVVcHRMVzBkMDFiZ0Z0ZEZH?= =?utf-8?B?ekxsT245NHB0S3cwYVBJSE9iMUVmeEJ3QmtNQjBTS2lRbFB2Ymk4RXZ2SnNw?= =?utf-8?B?VUNCV3ZtaDV3UGIxZWJWZWQvZ2J1cFhPRVpWNTNidDdHY1VQYnR2SDl1VitZ?= =?utf-8?B?VDBDa2NvaFZnL2JaTno0aHZLYjllWFU2N1lyQW1KQUVLYWp3eDhrcHo1Zkxk?= =?utf-8?B?VDhkcUg2Z0JiK3FaVHBIWDR4Zlp2Z2YxcnFaUTcxZ3paM0UvVWRyUT09?= X-OriginatorOrg: garyguo.net X-MS-Exchange-CrossTenant-Network-Message-Id: 5643830c-c5d4-44af-47a2-08de8ff4bdec X-MS-Exchange-CrossTenant-AuthSource: LOVP265MB8871.GBRP265.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Apr 2026 13:44:05.5207 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: bbc898ad-b10f-4e10-8552-d9377b823d45 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: OHZ+Vq/Cl/Fxa6b8zJlMLN3OgAh/JS8pZmmbSQR2sR78k0mEQUKKVBZEQe1WqJJU0YN3LgywGGbT6UTM6yBNAQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: LO8P265MB7687 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260401_064411_314196_70C8B9DA X-CRM114-Status: GOOD ( 10.06 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed Apr 1, 2026 at 12:45 PM BST, Miguel Ojeda wrote: > With the Rust version bump in place, the `RUSTC_HAS_COERCE_POINTEE` > Kconfig (automatic) option is always true. >=20 > Thus remove the option and simplify the code. >=20 > In particular, this includes removing our use of the predecessor unstable > features we used with Rust < 1.84.0 (`coerce_unsized`, `dispatch_from_dyn= ` > and `unsize`). >=20 > Signed-off-by: Miguel Ojeda Reviewed-by: Gary Guo > --- > init/Kconfig | 3 --- > rust/kernel/alloc/kbox.rs | 29 ++--------------------------- > rust/kernel/lib.rs | 8 +------- > rust/kernel/list/arc.rs | 22 +--------------------- > rust/kernel/sync/arc.rs | 21 ++------------------- > 5 files changed, 6 insertions(+), 77 deletions(-)