From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from NAM10-BN7-obe.outbound.protection.outlook.com (mail-bn7nam10on2059.outbound.protection.outlook.com [40.107.92.59]) (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 BD1EC13AD1C; Wed, 10 Sep 2025 01:09:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.92.59 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757466559; cv=fail; b=ck7kTg0lRcmjRiZJgguUShIvhcnLMjAL71kU3B5IERpOn4jh9nyEOiDsQtL9nkF6cyQTY/PDsBrI5c5qWNWnlCtzvYzLOMzAnd3Fy9BFNMezdcJM4TcmVwBo4phzrhWuVcWRsI5IRzriYxoKMyYTyl4WQhdfopoRqa5wyKq7/xs= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757466559; c=relaxed/simple; bh=xwo2pK4wyy2mw0rYVLjlqiHzRslbKuPnR5hSs19Pl88=; h=Message-ID:Date:Subject:To:Cc:References:From:In-Reply-To: Content-Type:MIME-Version; b=Hw+DGEo4UqE3r08gKNd2VSKmSVe9eEkNGu20qpRlFy1cQJRRd9kZLlAqFKmP9ViQFHfveHACBtcWnzL7pPY0tvn1u+S8HlrE9ZEKbvePXo3OaeI02jy/1NHRBtrYI05zVhPppSsQEf+jIjImLI2cS7mEv6hmNm8yjPl8JgLbxIQ= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com; spf=fail smtp.mailfrom=nvidia.com; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b=aqZeeGr0; arc=fail smtp.client-ip=40.107.92.59 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=nvidia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b="aqZeeGr0" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=XymUpvF5vBpZ/Rhp/270ejlDBZ6BPKbx2fQNPHgzmIgAEZkdIzGSMeJIAQZWdgBb0LgPVqKXd3/xKJZGK7w2J3CeF0O2IsxeXTVTKoanYFRMGZMdqS3r4KAP1YuNm20ybVJgLpeLzSfMs9eMfS3+pJmQ8n24yfUg9TZIaqQpqfKdO7YJKMeL5BGVE9nNunafgL6+tW3Qe9dYT1iDqo+xD8D3Wa8ABVWZkrtLG5R/SY+nSbFRerQXWWn/nqA7xeP+TO0oTxsahMlO9y91faXNSHuq+gbrLrRrp0C916pbVn4uO186YPYpgfwPf8E25jZdfTnN4bdSweqdndGlUJd8Yg== 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=VcPFffDgG2uonILcDq7HCpHfkFnTz85zw/Z+T/ZqDXc=; b=Cw9ipqlEuxGuWDREOt4YmG8l9ocpp7Z+NMppYaBUGTZ+aVbUhHS+iX/sjE/oOcimcKoPJ30YXjZPzw2epsN1vMo7/SXta8jEKxI/CiBlxdTSMT7gfraMrnBPGywtNqvNZYVFfIQE8ERr6HiC7Dj4f3GOAL/4NQdZSZiE4DlbGih/fEH7/PX1KBKNR6IqUI6rqaufARJXRIBtQE1hX0TUjrX2pgP1BR5aW9VE/3khTq4AnOp1y3q8f4fvVyTd4eN4ayAxsh2mH3fQRRB3Dh/ZRFj2LY7O9jtL6GlthN+3WT4f2BtlqZD8XugS1dwR6qPCNV8msZTsIGjcxFZGEMC+qA== 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=VcPFffDgG2uonILcDq7HCpHfkFnTz85zw/Z+T/ZqDXc=; b=aqZeeGr0k2Ec5nfl28QrJxgWhZ3HeE9+QYZb0/I73+eYsqjhYNZWthq7EBRC8yn2A9SMm+DDFop8PCCAAZZxhbH/VUaddH5RKAxKZwhv7gpPhGg/vnQjSEYOxcPzmRA2GnRGyqPprBng6hv89+zaq2fu5we8hy6mq7pvKMM2b8420811rrw/LYiV141b0wY5rkDUllXRbA3dMtF5clGmjWBxcnL4EYnDgDLIsWbIKVe1sBDRez5BcB7SiUv7y5L99ebpVu3MN6elTKbRPwRK98MnUz2Ww9W0NumCNXNgMP4AstZfyPKrgK0M4iKIQNarIwji1yWOFstj4+4mif6yhQ== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from BY5PR12MB4116.namprd12.prod.outlook.com (2603:10b6:a03:210::13) by DS2PR12MB9797.namprd12.prod.outlook.com (2603:10b6:8:2ba::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9094.22; Wed, 10 Sep 2025 01:09:14 +0000 Received: from BY5PR12MB4116.namprd12.prod.outlook.com ([fe80::81b6:1af8:921b:3fb4]) by BY5PR12MB4116.namprd12.prod.outlook.com ([fe80::81b6:1af8:921b:3fb4%4]) with mapi id 15.20.9094.021; Wed, 10 Sep 2025 01:09:14 +0000 Message-ID: <3f8de021-8eb3-4a7c-9adb-8244c5aa250a@nvidia.com> Date: Tue, 9 Sep 2025 18:09:13 -0700 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] rust: rbtree: add immutable cursor To: Miguel Ojeda , Danilo Krummrich Cc: Alice Ryhl , Vitaly Wool , rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, Alex Gaynor , Boqun Feng , Gary Guo , Bjorn Roy Baron , Benno Lossin , Andreas Hindborg , Trevor Gross , =?UTF-8?Q?Onur_=C3=96zkan?= References: <20250906140256.3059395-1-vitaly.wool@konsulko.se> <94252007-f389-41d0-b5a0-ed948225543a@kernel.org> Content-Language: en-US From: John Hubbard In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-ClientProxiedBy: BYAPR01CA0031.prod.exchangelabs.com (2603:10b6:a02:80::44) To BY5PR12MB4116.namprd12.prod.outlook.com (2603:10b6:a03:210::13) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BY5PR12MB4116:EE_|DS2PR12MB9797:EE_ X-MS-Office365-Filtering-Correlation-Id: 3f9b004f-5cfe-4ac4-b952-08ddf006a846 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|7416014|376014; X-Microsoft-Antispam-Message-Info: =?utf-8?B?eGZ4MzlmbzV0SE5TSHRpN2huS3dFS0VDRHJ2VzQ1TzNIRjdYNzdUQW1iWHZn?= =?utf-8?B?UmdYRFJCeXpnWTNIcGdRNmhQSDczc1R5cXdpNzVJVW1yVmNOT1JRaHhtSkll?= =?utf-8?B?WHFOekdvQkxVVzJvQlloZXJFUmlJSEJ1TmNHTEhOcWRXdU0vRWdLOGNnZm8w?= =?utf-8?B?MzZJS0N0Z3o3eXZNT0w4R0p5bERCaVVyeEZTRU14UW9sUUxOaDYrVFk0ZnRx?= =?utf-8?B?SWsrWnFnV3lZcGdTdzR6MmJLbVdXR2lrZE55NFp6N1M2MmRON2R1TTZSdjBY?= =?utf-8?B?MWNuSndKSmd4S0hMWEtzNTltc1J1TXM5YjUxclQyZUJ5ZEEwVDFaaC81NmRV?= =?utf-8?B?NldxSlJNZ0Z5cm9sSXZHYzlZVVZ3VG9mOW41VVYyUm9nUWIvTWttelRVY3lB?= =?utf-8?B?K1BGMXBEMHNia0dhemJlcGpWdWNOZHRydFl6VW1HdEgzcHdGNEkxRzhUaElY?= =?utf-8?B?Z0U3WTl6RUtEOFV2bERWZXhyNStoditkV01LcncvQlRKby9yTVhpcGIwSUJt?= =?utf-8?B?NDhBWTNiZFM4eFlPZnRlZVJUdmFJUHkxYlBkU0xmU281bGRUMHZIOE9UbzBI?= =?utf-8?B?NndYR3BjbkNYd2J2dnFEbC9SL1FPWEZ5VVJBZ2NRZ1lWblNUQ3FjbjVDVUxS?= =?utf-8?B?RWwwbWo3NUNyVVpvQmV3NVZUWktvNko2aVY2eUlzQTRpQ2dDM283azJ3Um1S?= =?utf-8?B?K1ZobnNYSzZPeWpDUFdVVXZhWEFkWWorRXFKYk5hejVXUytVUDNqYjRMaUNh?= =?utf-8?B?dmRkSktMY2tlY3ZFRTRDREVsSHFlMk1OMTkvUGxua28xVUVIL1Q2b2tLYkZ3?= =?utf-8?B?VXppZ2dIUC9SK2JuRmVNMzFXaElNM2I5cHNNbTV6REdOamtpMmpCeUt2YXV4?= =?utf-8?B?dzJqeHZQQlhWQ3FJZmhBd3RRbmJCenZ3MytNOEhORmZuYXQ5Q0lHdUZaYXdJ?= =?utf-8?B?eDA4SEQvdjdoSGVaZ0I2WEx6SFA3TXVxOWl5bWttV1pubFJyZE5aMnRTVjNJ?= =?utf-8?B?MXNCeXhVdm83S3pnWVZNSHU5aFNQUUkvc2JvLzRkTitTOHRGMUF2N0VpRUVX?= =?utf-8?B?ZkQ2b2M0YUlEdU9RRVZ3b2NXcnZYcDV1Y2pEVTREcElYTmJiYlRrK3QwVGsy?= =?utf-8?B?Z1VjaW5ER2F2QmhpYUYxOUNpMzk1YlhEcWNzandnUkJCbXBpRDZVSnQrbDF3?= =?utf-8?B?bDNabWNjemJnc0l0MklNelBZNGQzTU1UUUNwVyt0ZDB6UkszSUJobFlSVGdq?= =?utf-8?B?N1BPanpKSld2Wm5Jc0ZaYWNXalRxZ3NsQWNNQnI1dURUbER3ckNybURUZEpS?= =?utf-8?B?cGZ0dXVveTF5WEYrYTUrZUlCeFg2SGY4TzU0SXdCdldpR0RONmx4MUZFKzB5?= =?utf-8?B?UUwzTVhnWWg2dG90bURLWXRLVWZGdWxXRG9UQzdSMzdCSFJsOCsvZXVqdEww?= =?utf-8?B?VVZ4SzJsUjRiUWhkNDBlV3hsdUVPMmhjTUJzSmFucXdtb1VDcWllSWI1K1hi?= =?utf-8?B?YjF2dFFLMnVUSGJrTWVRN0p2L1llVWRlRUVMVWhEVmJTc2JIaWNoZ05LRkgz?= =?utf-8?B?UnhzSXZERFBKTDAyWlhSVmw4SWF4SXRLVmh3Mlo5eTBWOWRraHlKcXROcVoz?= =?utf-8?B?TXNweXNvVWhzeHdOUGNlVHFTYUl6UUxCamVHa3JKT1ZnNHQ5WXF6OUNtd2pk?= =?utf-8?B?YTJNNGp4T2I3UGhhOEZmQWpCVFUxT2l6a1VZcjZid0F4VWNoam8yK245bGI5?= =?utf-8?B?L1lqR2J3QUVnOFg5a0VxS2x6TlV2VkV6RGFySVphMi80MDZQeGdzaVIyMmt0?= =?utf-8?B?OUJaV0FHT0FxdWRuc1NIY2p1bXJ2TGwySTFUZ1lZK2F4U1IvL2tFQXpuMEVp?= =?utf-8?B?L0FMaXROYkg0ekg5Wmxtd1QwUTNSNkljblhLeHltZGhGQ1FlTTdCcW1uNHk3?= =?utf-8?Q?GkW5F1jaxMQ=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:BY5PR12MB4116.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(1800799024)(7416014)(376014);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?NEtKZUo5eFlYVTErTFhIdVdHeUVDcVJrZ3NuNGdDRnVFd0owNXc5OW1JZ0Vx?= =?utf-8?B?clJLcGlKVGQ1NUovK0xieDZJRjJlOXFKRCtxOFV5QTF1QU9rYTkxNlBVQWtj?= =?utf-8?B?dy82NXVjWDhUQ3BQVkx0ZzY4NUEvL1BROFpLOGQ3dm10UFpOcTdpRzM4U0JZ?= =?utf-8?B?ckFrMVRvQjhqeUJIRUdJSlMrWUtJNlpiNm9SdmxqVVNJRDVDcHFDbDlrUzlj?= =?utf-8?B?NCtTRWtjdEVDV2dRMDBCVVpYUWJBYWZxcWZRZlBzZ1hGVUgzdWlCL0RUUUI4?= =?utf-8?B?YktmYU1qUzNOaUc3ejV0YktjRVp3Wm8ydVczb29NMFpBUXB6KzgyQ2pHdkVO?= =?utf-8?B?MWRRcmVMbFMzeFZidEVqV0l4Ny9BVmNIN3d1ZUdiQmw1dXVQdmtBQ1pScWg1?= =?utf-8?B?TGVESzduaTJ5WnJJODl0SVRYOTdGemFHeXZHTHpERWYxZnMrMGdYYVJJVEM0?= =?utf-8?B?SHpWOCtmMjhNbE83UlJjazJVWWZ4QXJqM2ZFS1drSEoyUFZyVVcwQWVFMnZv?= =?utf-8?B?VlE3bGZxWjV6MHA0S3ZmYmo1dklyRzBoSS96dVYwREZEQitMZXBPMzBFVFBo?= =?utf-8?B?TU1WTXNIVFJNRHZNTkVxd0ZuTVVvRHlkSlk2bURlelg1VkRkN0QxTlVKVFJE?= =?utf-8?B?aHJrQVkrcElRRjBvZmFqVVpKY3lMUC9ITk9ON0FwWERDQ21FYktiSHo1RDZC?= =?utf-8?B?NFcwZmFuOE5ZZERDRDZFNUlBT1F1RmVVWm8ybWRVYytNZ3IvUzBQTHVYcHVR?= =?utf-8?B?RXRsQjdGb01EK1JBWWRMcTdLQVNjOFpVUHJnaWorR25ad2ZvQUp3OVJYdlQv?= =?utf-8?B?cU1BVTB0MS9nN01ZK2R5Ym0rRHpWTzRaRm9ybVNmU21sWEkvclJSR2h4TTV1?= =?utf-8?B?VkY5b1Y2UUxFRVo3UU5DTzJEZWEzNzlhdER3eXNxdmRXVkczMEl4ZE1ueW5h?= =?utf-8?B?YVE4VXcyZmV1TVlPMVdMRGNMZHgvRmY0b1dyQkVSaHUxK09CT0pFSnhZS0RB?= =?utf-8?B?UUk2bm5xUkxtcktVdWwrNlBzdXI0T1FuTTFUWHRvSWhXWGVMcHdkOHVKRTI1?= =?utf-8?B?UUw5OXVTNnRwOEdUck1CcDJzR1d1WUZqMnhwYmhSUkVaQzVTSGtHMmdBSHgy?= =?utf-8?B?QXNSMWttYk5XOUtwNlR3ajhxdG9aWmdmOFVjWXpuSkhNaEtEejdFZXVrWjhC?= =?utf-8?B?d3NDVUQrd1NxT2pRcThzSkRrNVhnak5ZVllCSWw0eTR2Z1VhZXJnS0NCWWd0?= =?utf-8?B?MXFBOHAwSGFZWThmTmhJalZDMjhvVUdkamNHNFBtcktuZUN3VktZN3lSWWtm?= =?utf-8?B?bWlqbWxmNUhNU2lOdVQzenFqVk1rMWFsN0V2WXN3YkMzVDJNMk03RDdSNUlr?= =?utf-8?B?cmN5VlZzMlJRcmtzME9La3JIenpaRmdwbVoycEJPdWg4aU9uc1h2Q0dST0l1?= =?utf-8?B?Wm9sQ1RLb2p0ZC9KOEw0WXdXaXJRcGppL2NRRFEweGFXYUcrTkVUeGlkZGli?= =?utf-8?B?UFMwRUZRWkprMmlFUWJYZlF6SnFYbjFjTHEyYkdnU042VEkzZW1BQ3hheWlP?= =?utf-8?B?SW1qZGVuRVZSb2tKeFkyOWdXZFc4TjFOWU55dXRrV0Q2QlVqWFR2OGdHOHQx?= =?utf-8?B?UmptMkhuKzBWYXlTcitUK2RES3V6am4zSUhscXRQanExa1BST0p2TllQSGQx?= =?utf-8?B?TlVqQTlxM0tIcG1QTGN6MnVuOXVjUCt2cmZ2ME1CM2pITlRqeVRZaEFuWlJw?= =?utf-8?B?OVJiSi96WmVYZ1A4SWJodDFGOUtuNStBOTZqb0t4Q1AvdmxHaDg5S21oUXpH?= =?utf-8?B?MUdtd3FpQXVrWlltQ1R3aVdVVEYxM3lKTVcvTHdRanBRWUt0bnRhbkptTHpD?= =?utf-8?B?K0tZL3I0NUZJaTRuRWN5dThrZWNIMm1DNUg3SkVBN3NrWEVPamlWNUloREc5?= =?utf-8?B?UEhHWkM5bFVCQ2RtOElJMEt1SGRGekYrclZGNGxuZ1RsQW1EOTFwbTJsSkRK?= =?utf-8?B?WHdWRmpCS3ZrTENoWTJxOFIvRUozUzgvbFZWVEtqRjhncHIyOTQ2ektZT2Nj?= =?utf-8?B?eGVqRGEweTc0aWNEUVl1R0pWTDlMMnNZa1Q5aDlxalJPd0theVR6WENrWE9D?= =?utf-8?Q?IPQRfDFpgDADpKaYoAVQvrdlQ?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 3f9b004f-5cfe-4ac4-b952-08ddf006a846 X-MS-Exchange-CrossTenant-AuthSource: BY5PR12MB4116.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Sep 2025 01:09:14.1239 (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: Gv+0W9A7mD/6fDiEteM6GMXRumbS+9/5qKsorcgrLHXMMw80HkVPjSlcJV7qaHOQZjJk76P9qzXH/fOSpAKnlA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS2PR12MB9797 On 9/8/25 2:21 AM, Miguel Ojeda wrote: > On Mon, Sep 8, 2025 at 11:06 AM Danilo Krummrich wrote: >> >> Why not use &raw? Consistency with the rest of the file? > > I guess -- it is a good thing, but since we are actively trying to > move to the operator, it would minimize work to avoid adding new ones: > > https://github.com/Rust-for-Linux/linux/issues/1148 > Interesting. I know the topic of rustc minimum version (1.78 right now) has been discussed a lot, but I'm somehow still confused about how this works, on nova for example. The &raw feature requires rustc 1.82.0. So I thought we couldn't use it. But clearly we can...right? So confused. Please help. :) thanks, -- John Hubbard