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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 642B7E77187 for ; Wed, 18 Dec 2024 08:46:25 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 900EE6B0083; Wed, 18 Dec 2024 03:46:24 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 8AF686B0085; Wed, 18 Dec 2024 03:46:24 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 729E96B0088; Wed, 18 Dec 2024 03:46:24 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 4EE096B0083 for ; Wed, 18 Dec 2024 03:46:24 -0500 (EST) Received: from smtpin29.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id EED14160C99 for ; Wed, 18 Dec 2024 08:46:23 +0000 (UTC) X-FDA: 82907447994.29.F1C6800 Received: from NAM04-DM6-obe.outbound.protection.outlook.com (mail-dm6nam04on2074.outbound.protection.outlook.com [40.107.102.74]) by imf05.hostedemail.com (Postfix) with ESMTP id B95EA10001C for ; Wed, 18 Dec 2024 08:45:20 +0000 (UTC) Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=Nvidia.com header.s=selector2 header.b=KmRfjIUo; spf=pass (imf05.hostedemail.com: domain of gal@nvidia.com designates 40.107.102.74 as permitted sender) smtp.mailfrom=gal@nvidia.com; dmarc=pass (policy=reject) header.from=nvidia.com; arc=pass ("microsoft.com:s=arcselector10001:i=1") ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1734511548; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=vNA/9tI4opCBkTU0xM+fesgTeVW/0dw6XRs6igxiI2g=; b=gMuT72yeq2cnZlQ7J1Cu440p+JJAS1Z682k9cAwLIf9rLFeJbTCgCxQYIUsOFcnVTS2z5o zVnF9Y8kzA+HJqeKpf9a07HL7Z6Io7VC+O3/4EAxlroEjPLAuSkzF59j8W8nJbCOC4FW6C 5VrfLb5dIzOnEKv5eMetsn7A2uNLvMg= ARC-Authentication-Results: i=2; imf05.hostedemail.com; dkim=pass header.d=Nvidia.com header.s=selector2 header.b=KmRfjIUo; spf=pass (imf05.hostedemail.com: domain of gal@nvidia.com designates 40.107.102.74 as permitted sender) smtp.mailfrom=gal@nvidia.com; dmarc=pass (policy=reject) header.from=nvidia.com; arc=pass ("microsoft.com:s=arcselector10001:i=1") ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1734511548; a=rsa-sha256; cv=pass; b=D2MZFa9HgHkAnNhGzyqox2rRvg9EmszJehwI08e8+yRSJbeLjXB+G7L7/hIp33lqFXJ0BW g9NhXS72ZsMg/iI56+Mdirkr4YmnqGC1XtZIKxcElqlVl9Y4FBfuDSWFp0lOlln5pr2KMz XKS/fTRIVSNTYp9SgD+g9mwrALg3mI8= ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=Hkbou1+fn47Scmlk3me69S03R4s7RO9tAiOg/fBbeyBBIFbDnUnySdH63JBGXwJG980pOcybx3/GntZvEkmQbb07Q6q6F5H8upFgzFOUV121keDeHDH/gqvLqqlY2fL/QbyJ380XFWpKGLD3vZ0DyIqeE+zYsLNVw/ax2xQDzCmkLMBngZ2O6SyLMx7HEbfDGpvt3c926tswTEI/+v6jxVP4gv6uxIuaA8kaIn3tJTLtlXYl2Wr4boRHkumO6hZNAWshoNL9zIWmCASJPe1R9fwYVd6AKAutEdICq+1ZphTgXZUJu4HuQKNZNTcApB4tvF9ezyA794OJZK2fOZHjOg== 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=vNA/9tI4opCBkTU0xM+fesgTeVW/0dw6XRs6igxiI2g=; b=ZAJM5F0MLTDem9/pD8mh7slOlS9P4Ob6saVHcnLODISV8wbC7qUqGyvI0Zz6rdp4SFK5sos3ngcMkEjqn+3byNFkx1MAeh3Hk5nkulyJF12XbreKHXZ7Z94efSaeBt8E+9QWPpn9F1zlQVgu4WyATtDGRtvTizn+jojpxBjP3HCz7alVRGmNQ0OVoCkHrU08LJUiGm0Gvo42DwnAqHKxxw8ZVuodmW+flO7I6gMa7eBZQen+eOnV/qI64p9KwIew8OzzDmkHUFnnth0bUuBkp7App9j88zJtBXByjZBnZAEA/SPJ5jz3HTfOI4lHfNJUh6M9uO2ZmcZ3fSTmvuayjQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=vNA/9tI4opCBkTU0xM+fesgTeVW/0dw6XRs6igxiI2g=; b=KmRfjIUo6eQiZBtbNuLCg7ccBVhcGcuSa/XNxO3jP4XgekSEibvtT6vu+KzO+/2xbJtW3bOwJscebBDP6eVvIF/8rHO0Us5/qAbfJmeuJS8XJ+FPb5XTG1EiSpcbE7ZiwHQ1oNK9JSm67GR/1EdgFcz8LpvHZxkE0qZQlDbLuk4nx2bGPCBt3fKUIqbT2FPirG2jQ0hoI8o1kmxU9DeY5GUCwwoIcUZweCLe073nZVKk1b0CGDYVeZxumv/OD7z1/TCvedeSMR+tjod2/3KAx4ED0jDRvp18hYA7u/QGNs2B0BpQCRXopHdfj7jcV+PAdJouG+koG4Pz4wHTCw59+w== Received: from CH3PR12MB7500.namprd12.prod.outlook.com (2603:10b6:610:148::17) by CH2PR12MB4038.namprd12.prod.outlook.com (2603:10b6:610:7b::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8272.13; Wed, 18 Dec 2024 08:46:18 +0000 Received: from CH3PR12MB7500.namprd12.prod.outlook.com ([fe80::7470:5626:d269:2bf2]) by CH3PR12MB7500.namprd12.prod.outlook.com ([fe80::7470:5626:d269:2bf2%6]) with mapi id 15.20.8272.005; Wed, 18 Dec 2024 08:46:18 +0000 Message-ID: Date: Wed, 18 Dec 2024 10:46:13 +0200 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 3/3] percpu: Cast percpu pointer in PERCPU_PTR() via unsigned long To: Uros Bizjak Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, "netdev@vger.kernel.org" , Dennis Zhou , Tejun Heo , Christoph Lameter , Andrew Morton References: <20241021080856.48746-1-ubizjak@gmail.com> <20241021080856.48746-3-ubizjak@gmail.com> <7590f546-4021-4602-9252-0d525de35b52@nvidia.com> From: Gal Pressman Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-ClientProxiedBy: FR3P281CA0115.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:a3::10) To CH3PR12MB7500.namprd12.prod.outlook.com (2603:10b6:610:148::17) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH3PR12MB7500:EE_|CH2PR12MB4038:EE_ X-MS-Office365-Filtering-Correlation-Id: a652cdd1-3183-4055-4612-08dd1f407073 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|366016|7053199007; X-Microsoft-Antispam-Message-Info: =?utf-8?B?WVVQU05oYVhlZTdZVjhaNGxQOHY0ZldpTGpnYlZZd09hTVJkNHJORDVTK3FF?= =?utf-8?B?N0duV3JnbjJtbkFJZlNySmU3ZkpBZE5FR2E4OUhzLzJNaHBKYWpqTTB5eStQ?= =?utf-8?B?TjVNeE04L0hlQ1NwcUsvcUQ4ZGFmd21ZdUdnYkYyNkpiVmJXZFVFemdkNFhB?= =?utf-8?B?ZjBuY0hmM0U1WFZjWHNORVlWWEIvUWs2S3pyTytUOTBhaGxOUDFuUmZhZkx0?= =?utf-8?B?WHZ4dHBaR1dTS0lRZHBLN2krWGJzWjRaZFNWcmZVUGgvSFovRW93TTBNbGRx?= =?utf-8?B?a2tCeWs5T1FMN2hCK3NvTGlzSzZFcU5TUWRxWkcwRmRkL2NwM0h2Mm12UmtE?= =?utf-8?B?TnNOQ2JWSk9KQmhnS2ZwYVRDZlR1Mmh5dzRhK3hoVlFQL1BXd3NWQ2ZlS3Rp?= =?utf-8?B?Q2hMUjVoc3FXS1I1NFpraHJ3UXphYjdjSllUd0Z5TUlWbGl4S3Y5bUFhdkdR?= =?utf-8?B?czZqYUJRTHl1N2pyQnlRNnR2MUk3bmlsTUFDeFFzY3QxaDYzdVEzY3kwYjc0?= =?utf-8?B?SFBMSGhWUGxYN0hEMklON1BTMGZoQlRSdXc5djJDYmEwU0c2Q2ZJVktTaGdR?= =?utf-8?B?bVA0NzFKSXVSd1hMQjNBQjVwZ1l1ak11OGRKdHhqVkIvc3JjQWM0VkJKSUU2?= =?utf-8?B?WjJZaGkrbHovYkFZU0w0dFV4dzhWYTdkVVU5UFUrdkQ3S2ZVdC9NdmYzNDFS?= =?utf-8?B?amNEa05hZ0JYbm1SNVczaHY4VGJNYlA2UTduN3FYcnU0VnFyV1RyZHBHOUNz?= =?utf-8?B?TXFMRkg0a01oVExvcTJ4bW81YWpCTG9LcTNUWnBoaFVSV0Y0MzJnSGNkcXNS?= =?utf-8?B?SWF4MlV1ZHNXQmJyR2xkMURBTDNadGNPUE01SVBJU0ZWZmhJVVR5YktZT3p4?= =?utf-8?B?VzhkUEE3TEFvMjlIK2UwTitvdGZPUGMyQlVwMDU2bXI0N0dZcjBrQi9WeHJh?= =?utf-8?B?UDZvS2U2c3E1RURsSXFxUDNncWh0K0ZLaS9DK3ZkUWwxQ3dWMTgzZU9KbUpN?= =?utf-8?B?OVRZbC9pSm5wYmx5eXV5OTZnL1U1RzBMUWVXNlhmOCthMGg3VVFDR3MxOEt1?= =?utf-8?B?M1VuRUFZOXFxSEJOVzNsT3ladDVsc0lERktaZjNQUEc0eC9WTERGR1pScEtp?= =?utf-8?B?cFRsQW9EVVN1MGVWN1hVcDEva1NOQ1NpVGVqVmRIMnhRallUZHc1QTUzTHNR?= =?utf-8?B?bVI5c0kzaHdhVG16Mlh4dDUvMEZHNlZYS2M1MkhyZDJPUEZ0WnRxMEVZenpZ?= =?utf-8?B?T2sxdGFsNVRxNldJaVRvL1NsY2Zsd0xWTm4xZGIvcnJyd2JOK2xHVDIrNTlr?= =?utf-8?B?R0tKb3NMaEZ2RUVNYnN1YUdVZGd2ZlkyZjh6UDQ0dXVzQ1NRV3A5UHYvME12?= =?utf-8?B?Z1k2NVhmZ3NrSGxoTm9IWXN5N20wc3FNRHJuUWxNM0pBeG9JNjFONG1heDFM?= =?utf-8?B?dUs4K0R1UVVKbGxKcWtRSkpTaGpLQTY0MVVpdEdEU3d5dmg1WjVsN1d4QmtQ?= =?utf-8?B?a0RHWjQwLzdYdlVSRTZuU3U2ZEZpS3l1NTEyWVBidmJCWVVmWkNtNjNRNkdu?= =?utf-8?B?cVdOL3gwN0YyL1VXb29OdXBnU1lhamdsVTRMUEsySTdQQm9QRnN6dExUZ0I2?= =?utf-8?B?ai94bG9NTFZJNVR6QVBxNXlHbjNMcFFNeVUwRUVVeVhHcEtjOEdFa1hRREZy?= =?utf-8?B?eWtOLy8xNEVFdlJNRmtSckQrend5NDBPdldISk5CZXRZMExOMGlCRTdRSDRB?= =?utf-8?B?SUhNOUZ3dkVTWThiVlpNc2pjN0MvT1dKdFpTWStIL05seEkyd3JEcFU5TG5D?= =?utf-8?B?WVRGVFRRSGZJbEJmVU9vc3YycjNBem5jWXc4MFFDdVZSdU1EZmVwaC8yMTZQ?= =?utf-8?Q?gnJFv/hgp6H9a?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:CH3PR12MB7500.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(376014)(1800799024)(366016)(7053199007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?eEc0NzgzWEoyeFQ4S3J1azZjbHZydnhSYXl1QmJDbXZOQ1VDMFdsajZRbHhH?= =?utf-8?B?eEI2ejJQRSt5akttcUFWT0lTanhKNStYK2hQdlZBOTZTKzVOaFdzY0pVU0ZG?= =?utf-8?B?QXZlNGtwU1lwZFhGZDBBSGN5Rk8vaHp4YWN5TGZuZmJmS1BaT3ZReXZ0MTJw?= =?utf-8?B?bWZSNVpFQ0JKdEhkRzdteWdOcXUrRWZ1anBpOGxYbHJDNTNyNGdTMUZuMzMx?= =?utf-8?B?TzFmdmtsbmhnRGJkV2x6am5ES3lwWkdZMTNodk9sTEJuSjAvY01oT0ZrVXB4?= =?utf-8?B?N2dvTVRlemlsSWQrQnI1bkExRlNqeDFFVHV1WFlhbjJYZDlHYitNcS9QQURv?= =?utf-8?B?bEVzUEpSSVBrY3EzUlR5Z1N4K1IxaWd2WXlBN2YrdFc0ak5kZklsRTZPWktD?= =?utf-8?B?VTFZRStPRnZEWThsOGRjeEtKQUJPOHhNOE1NWExyU3dCQ0VHaDhoazJaLzdp?= =?utf-8?B?bmFqTElITkg3NnFIblJSZDRaeUlyeEJLT3RtWjdyMkVBbVBCTkltNlRyaEZm?= =?utf-8?B?VU1TZElLS2dZREtCeXEyb1VrR2FLYWVLb3R5RW1sWnBROUtvTEw0OTFqaklp?= =?utf-8?B?QUJZU2NUTk1jdWlTbmJCN0UwWmQ4cTBZMXhlaDMreThrYURDQzUwU1VtM25p?= =?utf-8?B?Sy9WbUZCZWhqZXIwR0NtWWVPcjdkRnVRM09UMk5IWjErOGhORjZrYkZJUGFR?= =?utf-8?B?aVV0bTRFWFluM1lvMjBqYXlnY3FPU3RuYnh3M0lBVEViSnp2b2lDa0lNUWgr?= =?utf-8?B?SVZhcEN6M3dEeWgwdTFvbmZwNjArRUpUUkIzVXpXWmJkK3F3bXAzSlVKclBr?= =?utf-8?B?R3RLd0ZteDlNTnN3TGNDT3JJVjhCOUduemd5dCtPRVB3aDd0N0NPTTcwWTZx?= =?utf-8?B?TzBHRVA1TklUVHZaVGZWdFdEeDNjV2NNYVpGSFFUdE13cCtSajFDQzFEcXBC?= =?utf-8?B?RUM0c0hSSC9ZVEk0djlZU2FzTk9iNnlGSjg1UEd2WGU2Y3JwOFdFRmEzQ3FF?= =?utf-8?B?Qmk1bjFXRjdKWlRnMFpEVi91dW9zUG5NbGFWMGNBSEM0L1ZoVFpQMWdkek5r?= =?utf-8?B?TlM1ZXpMRDdNRHA2WklDY21kK3RqZUxzWFpCV212dHhsMEdGcVlwb1hoVG01?= =?utf-8?B?SXhRNFk5cXdPY0NtOThmcFhOWnRoQ2NuL1JIMjFoUnBmZWlvMEd1WFRFejd2?= =?utf-8?B?YjhKZlVScHFJT281bkxJWFhSVXZYZGNmNXFQUW4wemMrc2M1Rks1ZVRXbWxB?= =?utf-8?B?WlRoZFJobC92SlJQYmtua0NMUXFOQkNGYzdveTl0ZnMwU3FBSzZ6ZnlqNm1i?= =?utf-8?B?Uk1pUTdELzdhb1kyMXV2OUtRaVc5VXZuM1M3QjYvNW5ydnIvRTJZaExVMHFT?= =?utf-8?B?MFBINDc5QS81cmE5M043eDJKcjBKWk90bjU1MHh2VkNxMEZxbTdhenpKUUZB?= =?utf-8?B?bWFoUThUZTEyenZKNWJHV2xCeHpvR0phQXhabGtHa29mYVplN3dFMVo3M3Z5?= =?utf-8?B?MDVMNmFud1hzWEMyLzRuRzduSWh0c1RtNWx4VElRTXJuQWdoKzJqeDdjNUlT?= =?utf-8?B?dG5HSXhFMWs3TjJlUTNPVkNPZDNYd1Zhd1MwTnlOQnV3aDhvSVo0cm15TXpQ?= =?utf-8?B?ekE3dDJOcFdzSS85S1JCeVZwbktmOFlIaEFFMWlBWUlWVEhPQUZ5YkgzQlFR?= =?utf-8?B?Q2V6bUVBQ3hNWEJNeHlxVHlkTXpSR0k3cFd1M2tidGxKQnhDUWN4QnRUWnMy?= =?utf-8?B?TzY2Y2k2OWtUV0MvUWJXQ2QzRkpnMDFQcHB2TVZYMFYwbUNUUGFsNDJTNm04?= =?utf-8?B?WVJ1R0J3VE16R3R2YkFxeGNBTjlSWkdQUFY5dWNQbXpncjBBbG0zM1pKQ0Y5?= =?utf-8?B?b2tSZi9LblNabHJiMVdpZE9qM1hwbG9saTdON3kwL0JubmkyZ2JUaHNVaFNt?= =?utf-8?B?cWg4bkhqVVNSTlVmdUZqNTd1SXNoUi9QMldnMDJhTGsxRFd5bm9DRk80QmMv?= =?utf-8?B?b3JrSEhMS0ZkMFNHNDFuSGdqSkQzZkphRC9TWWRRcHZBc0pScm13TzFVanVt?= =?utf-8?B?UVlRYS9PeUZBOGFacmYyS2ZxWEQ3RjNoODdSTDFhbHl3VTJZS3BDRVk3NklC?= =?utf-8?Q?SBEXOJnrcGcjSKTcGFca4efsg?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: a652cdd1-3183-4055-4612-08dd1f407073 X-MS-Exchange-CrossTenant-AuthSource: CH3PR12MB7500.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Dec 2024 08:46:18.3943 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 6dyvg0T5+8CXPGFicK9iUz/+hrdnw1HG8APBL+rYj/rgLpowoipWmUZJLYGhJ1RC X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR12MB4038 X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: B95EA10001C X-Rspam-User: X-Stat-Signature: 8bogm1apcnos914d5dkb6s7ygfeidm17 X-HE-Tag: 1734511520-828777 X-HE-Meta: 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 DElzGMtB 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 18/12/2024 10:40, Uros Bizjak wrote: > On Wed, Dec 18, 2024 at 8:54 AM Gal Pressman wrote: >> >> On 21/10/2024 11:07, Uros Bizjak wrote: >>> Cast pointer from percpu address space to generic (kernel) address >>> space in PERCPU_PTR() macro via unsigned long intermediate cast [1]. >>> This intermediate cast is also required to avoid build failure >>> when GCC's strict named address space checks for x86 targets [2] >>> are enabled. >>> >>> Found by GCC's named address space checks. >>> >>> [1] https://sparse.docs.kernel.org/en/latest/annotations.html#address-space-name >>> [2] https://gcc.gnu.org/onlinedocs/gcc/Named-Address-Spaces.html#x86-Named-Address-Spaces >>> >>> Signed-off-by: Uros Bizjak >>> Cc: Dennis Zhou >>> Cc: Tejun Heo >>> Cc: Christoph Lameter >>> Cc: Andrew Morton >>> --- >>> include/linux/percpu-defs.h | 5 ++++- >>> 1 file changed, 4 insertions(+), 1 deletion(-) >>> >>> diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h >>> index e1cf7982424f..35842d1e3879 100644 >>> --- a/include/linux/percpu-defs.h >>> +++ b/include/linux/percpu-defs.h >>> @@ -221,7 +221,10 @@ do { \ >>> } while (0) >>> >>> #define PERCPU_PTR(__p) \ >>> - (typeof(*(__p)) __force __kernel *)(__p); >>> +({ \ >>> + unsigned long __pcpu_ptr = (__force unsigned long)(__p); \ >>> + (typeof(*(__p)) __force __kernel *)(__pcpu_ptr); \ >>> +}) >>> >>> #ifdef CONFIG_SMP >>> >> >> Hello Uros, >> >> We've encountered a kernel panic on boot [1] bisected to this patch. >> I believe the patch is fine and the issue is caused by a compiler bug. >> The panic reproduces when compiling the kernel with gcc 11.3.1, but does >> not reproduce with latest gcc/clang. >> >> I have a patch that workarounds the issue by ditching the intermediate >> variable and does the casting in a single line. Will that be enough to >> solve the sparse/build issues? > > Yes, single line like: > > (typeof(*(__p)) __force __kernel *)(__force unsigned long)(__pcpu_ptr); > > should be OK. > > Thanks, > Uros. Awesome, I'll submit a patch unless I hear any objections. Thanks Uros!