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 B2661C7EE23 for ; Fri, 12 May 2023 18:22:17 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B270E900011; Fri, 12 May 2023 14:22:15 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A8CC4900003; Fri, 12 May 2023 14:22:15 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 83E56900011; Fri, 12 May 2023 14:22:15 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id 68E49900003 for ; Fri, 12 May 2023 14:22:15 -0400 (EDT) Received: from smtpin06.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 47A7980F4D for ; Fri, 12 May 2023 18:22:15 +0000 (UTC) X-FDA: 80782422630.06.AC03326 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by imf06.hostedemail.com (Postfix) with ESMTP id C8903180015 for ; Fri, 12 May 2023 18:22:11 +0000 (UTC) Authentication-Results: imf06.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2023-03-30 header.b=AC9vkotL; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=wKbTWKhm; spf=pass (imf06.hostedemail.com: domain of liam.howlett@oracle.com designates 205.220.177.32 as permitted sender) smtp.mailfrom=liam.howlett@oracle.com; arc=pass ("microsoft.com:s=arcselector9901:i=1"); dmarc=pass (policy=none) header.from=oracle.com ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1683915731; 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=XgTAEgOBahmZoVkTBhCJQdosI4AXXEwWd8kwuVIwA/8=; b=Dsl6gPBatu0shzmOB22jT8smeifg8etgf+Z6UP4zHZQtPsrhaWHd5Lmp0yG1V/IJPO+sGG rUcDNMYMwj1fKS893MHcuRldkhwgMSL/GNwS7P99zUFS3SGFm0wWc+Fb+NWhc1GmUekL0H J2+LCWtVO8aZFtbppQagtd5TK5UNfhE= ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1683915731; a=rsa-sha256; cv=pass; b=p6/hYV+wqHPW8O6ccasEoUOw4+l+7z0JxvRqQOmYYkbjci7mu/PlnYAEY6D2y/I8RLCDmQ AXeB7qV0iWfMHVHBNtYqHtZjxq5+oRIOdLvNFyll1crhnuEuouu7KAxaFG5E1en2yZXovm eGq+OFC7BuGzWYxsp3HCGNNcWvRH26I= ARC-Authentication-Results: i=2; imf06.hostedemail.com; dkim=pass header.d=oracle.com header.s=corp-2023-03-30 header.b=AC9vkotL; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=wKbTWKhm; spf=pass (imf06.hostedemail.com: domain of liam.howlett@oracle.com designates 205.220.177.32 as permitted sender) smtp.mailfrom=liam.howlett@oracle.com; arc=pass ("microsoft.com:s=arcselector9901:i=1"); dmarc=pass (policy=none) header.from=oracle.com Received: from pps.filterd (m0246632.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 34CF4ArN002642; Fri, 12 May 2023 18:22:11 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : content-transfer-encoding : content-type : mime-version; s=corp-2023-03-30; bh=XgTAEgOBahmZoVkTBhCJQdosI4AXXEwWd8kwuVIwA/8=; b=AC9vkotLHXQHdzHJbPcD7wcC/5+f2n1Be71PgqHwUZcTC8Kmx4pOWW2XVxW+mPW1NDfK FOmSEOV0nlWFUb5ZNcxSSTv9ZxrluhgmjkT1d6LUxBmcJlwZS8B6Fsc94iVncCKL/aVv gDcBXtZUNLBf5XpBFuELjzW9rG1xHfaZLTuGZm61LHQZFt4IGVcYg294ES/VxURkc2zH Mjc+UrczsdV/kk5t1vCPlnsl8E8BROBicy0tI7Yt7s9kDheETyV9o5OULXLbzcH5uxUN EYjvBAExZiociAr9AtPc4EciktucqHjmwsaidcWIkhrIJULK4XHB5dcIAB6EHjq3Qpbn 0g== Received: from phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta02.appoci.oracle.com [147.154.114.232]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3qf777bkxk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 12 May 2023 18:22:10 +0000 Received: from pps.filterd (phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 34CH2mTv014331; Fri, 12 May 2023 18:22:09 GMT Received: from nam12-dm6-obe.outbound.protection.outlook.com (mail-dm6nam12lp2168.outbound.protection.outlook.com [104.47.59.168]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 3qf8316cqx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 12 May 2023 18:22:09 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=lGq5iUdhVaF6YyTzu8Xhz1oWNbNm2dAU0jv9ndDpuJPhefwuJcaRvXc7zVog1Zur/r4C2Vj0eKB5PmtPeR7eAlpXfM+MRiVelyyTQEupXr7UIJK/hoPOoSe6UaXpgKS4tBErYqZd85Ty9hLuBDMWfsUTFbEjHKxdzwqavf7KM1dDJKCXiNGGXvgAxyI674m9Fg4kcVpqkRhdBW3YGkcA7gvo2Ail9G9ckrORHCH8s/fd6zhvA5ouGd6/l5CsnUvZT3PbZGSmusZGwxposq8Es2DQYIpZ4N+6kEuayhSz3f33qvNfNoz6OnN1xmTRngn1SPDFyYtdEnp8OjobEQWgqw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; 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=XgTAEgOBahmZoVkTBhCJQdosI4AXXEwWd8kwuVIwA/8=; b=aiDtqf8Rc5vNhR+bfqjh/9Hk6jW/VrgXeeGuXf1fiAXGu1NOnvXjryhNwfkcnzBLIAmuXkxrKoUl/cc3e5DJsc3GkPx8XhIO8KJzhL7G+hgc+RG/7+7vNSWqyR7I6RVrbxIkSqiiOWrbPjKWxmLg9g2uo8ezhZZk3e8PJk1lxf3sNvDUIJtgohDn3e1Zw5UPJjvkEmw7o0LjnSrr+Lw65CQ0nLm9UMiHCk5flemNwoSzCs28teOnYbVA73cZjYzIptLkgWlTOVtDhJPLQEB+acsjTMBY6I3NJd1L5c1BWmDq0M3sguwCnv9S7ZYkCGv/kQxX+/2ogt7nfi9jURoIHA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oracle.com; dmarc=pass action=none header.from=oracle.com; dkim=pass header.d=oracle.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.onmicrosoft.com; s=selector2-oracle-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=XgTAEgOBahmZoVkTBhCJQdosI4AXXEwWd8kwuVIwA/8=; b=wKbTWKhmgMi9UXxBhfrGx5YWF0hFdodmwPPa+RdZP5J1dPWfooFrIEhfFlxDDemBLyM9pKV92RbNk37Yf/cUtr7C7Klwf21hMYLxm6DMTighvgZRpjEpbGRls6oSsc2xcWHZpZ46LHSgzgqiHh0AEpQwXrALq/dOeW70Duwncxg= Received: from SN6PR10MB3022.namprd10.prod.outlook.com (2603:10b6:805:d8::25) by CH0PR10MB5211.namprd10.prod.outlook.com (2603:10b6:610:df::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6387.18; Fri, 12 May 2023 18:22:07 +0000 Received: from SN6PR10MB3022.namprd10.prod.outlook.com ([fe80::c478:d218:8f15:37c]) by SN6PR10MB3022.namprd10.prod.outlook.com ([fe80::c478:d218:8f15:37c%6]) with mapi id 15.20.6363.032; Fri, 12 May 2023 18:22:07 +0000 From: "Liam R. Howlett" To: Andrew Morton Cc: maple-tree@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Liam R. Howlett" Subject: [PATCH v3 30/35] maple_tree: Introduce mas_prev_slot() interface Date: Fri, 12 May 2023 14:20:31 -0400 Message-Id: <20230512182036.359030-31-Liam.Howlett@oracle.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230512182036.359030-1-Liam.Howlett@oracle.com> References: <20230512182036.359030-1-Liam.Howlett@oracle.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: YT4PR01CA0094.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:ff::8) To SN6PR10MB3022.namprd10.prod.outlook.com (2603:10b6:805:d8::25) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN6PR10MB3022:EE_|CH0PR10MB5211:EE_ X-MS-Office365-Filtering-Correlation-Id: f59aea67-cdfd-4c90-ebb0-08db5315cb31 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: vefVbKiND+3Atd4rc0XEpjAXGgbJ9BIxiykvzFvCOEiSIYiO1PS4IR3/eHa9WSeWPG9FnEAF3U3HpI/35IjS7DQUFDOmmXKZPQHQnLR1dIPs//Jvdu3OSL3ooeNTbAwzoPNdRai7I/rdiGokE7ostnwBJItkDME0DlV9n3+e6p2QFfN/YCWrgOFE4pKZ9AtI8RWYDakevepxLWa6s3J3tnjX0PoKiejL9DhQJrG9BqzFxmoAfvmzfFn2HAOZex1kSvNDn2JYDdBLvecp8OD/86eq2AKq9Rnxu9JOs7thbFYGNFmMA73BHBiqTsNnHC58iIFobUqs3gkHoK+88VC/vjBhlrTkV9lOQJ/xyWxoKpn0VSlkkDGI7E7W3rVtSKpBGnUlJF+FFe5aseaP5MdfGGlGnwoGev42iaZMFVKi4DPdV72Sb48UYrkxQbIpfRjC9GKWCVCNAww/DdVkfarF/WrGm9EF77s2ciIwd8zKq6L/7TGsZOGZQpdkNo0Fv0e1AdnqpWQ6z+WsU/ulaewpfwLyF239LKWBZ2dsFgwwhWzoXKzbFsXJl3bptkJikXVW X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SN6PR10MB3022.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(376002)(396003)(346002)(366004)(136003)(39860400002)(451199021)(2616005)(8936002)(8676002)(6506007)(38100700002)(26005)(6512007)(478600001)(1076003)(36756003)(186003)(4326008)(2906002)(66556008)(66476007)(6916009)(66946007)(83380400001)(5660300002)(6486002)(316002)(107886003)(6666004)(86362001)(41300700001);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?2inNoTtFt0hBm/bV/HtzONp3Mpfscgcouggp6HcOKnxd/70pIfk441hx0f9b?= =?us-ascii?Q?7QHbEKtFPdJE49cb2DzStYnffVcoan9Sdz/5ofwZh/kl7xJoce+6/CgJwbd2?= =?us-ascii?Q?Wzb1imSGY+f+qobn5ss9l/9Z553tcJwZP0o4yl3230/3m3Ov0RwpWl+BZdXB?= =?us-ascii?Q?RCRsRjRMqRwhGhcepVgJLOGY/+uHMuS1xV4yb/SAVry7uKSg4VHosxe1eFli?= =?us-ascii?Q?WupM+YBw91zjXlPl4vB0NL5Q3c5HYiS0PnYLnIhavngOf96Run7CoFAWLqOz?= =?us-ascii?Q?XHlxasHpPlqm2M+kZP6/zm4HYwOMUE0Ys+s1TMGvhWJwVt13gziPxnVY3n1e?= =?us-ascii?Q?lTp6OwRjNvoKYOga6C7ix9Ixgjja5W1ARYuu9NK+r+qytg5m+RPlBjAWhtgw?= =?us-ascii?Q?N9dO+6KnCvn8P9dqGRdilDVXpiOzlmHNq8hl3bj/uTlM571GKEtfBGcvobqy?= =?us-ascii?Q?LeITOileQOsL4TIvF33AylJADxlQXCpRiDSrTrSDhtWZVjMeLBJ5/YAdES+u?= =?us-ascii?Q?Iep10BuK89B/L31sy9pKdqpTR2BCsRgc2T9f3L98DqTP1zH6fI634Gu3wYMI?= =?us-ascii?Q?enkG96+qHBaKfEl+NF6l57Tu2Au/JOBgoJsGsY7DKOxG0LV/mS39+it8VXJD?= =?us-ascii?Q?hE+MPSSQUw1swtsDEHZwLwUDTFpYK/HDnXOyJ5OUjh7qNySSP1I4rfAvi/7n?= =?us-ascii?Q?P2MKfDCsW4KoSFCe6htt0+tZIZhIX82DaLMivv2gGeNQb/JRn2/JugBoleYv?= =?us-ascii?Q?JT1A3ejZWvYJ3Q2QcgTd2HwQXhaV6NgCd+j4jmz9XpMMkEhh4FHd1zp9vMEf?= =?us-ascii?Q?vHZAapJUfVKPR+6pb3edHTNKbnLwZXCIYn49lPpWQQmH4gGHvxdsNDRKqSJk?= =?us-ascii?Q?iRWftR4FkrdqbmbeDSFb4E/URU9YR5yNPxwDOrxDXQNXlNvrYohd+CiJVAHM?= =?us-ascii?Q?4aiKZfchV4ogy5DLlDu5TeuRaYqmQoLcjxFvDrozltzJgEMUBtiDqxSEGsbU?= =?us-ascii?Q?bQRaX2SVqOxFhyY2WkX5OeLMglSATcuV8ux075fYasUg0yxsAh9U6dSu8ach?= =?us-ascii?Q?vOai1WA3GqNpOTGikJOUcUNww25iANzSI4bgfVbUUSSjxz7tRWpDwfjnAHHp?= =?us-ascii?Q?CRszhhc+W2lKR/3ZlSyE6jtYgpUPhFg7fS/qtExRDfrG+ibiS7Xjte4CIFmV?= =?us-ascii?Q?nSO2+6UZc7PGC1mvKNotpocD5cC3jB1bG+e16HNaQAQITTmsM6INACmTXlfx?= =?us-ascii?Q?bc27FqrCrkz60wYxG0EaRnv0d/V4o8FrTi8PICuVHvkVOmt5kq6PcBGhSSKy?= =?us-ascii?Q?B1xNY1GOjVgIk1BFYSUX9+pf6FKGjvJdIN/lDy8ZPEHXFCGfkBlxjeKXTkt0?= =?us-ascii?Q?kzMnPB40FyPEls3jENujoKXXQgdWx02If0dSjMtYQqetw+B3e9UIpf72SO4u?= =?us-ascii?Q?7q08Rj620CaV4MOxvwvDXcJv9X1wTNL9cVdzBV0+MvyiIoX94+AuKCW1CrUN?= =?us-ascii?Q?Gxb8H5GF03rOSn9xYlGA5w9TmzTjKvsUeNo3YnSl4rc8H2i4oBYxyrajnJVf?= =?us-ascii?Q?ILRTBvUEHJ04dg7K6RAvKqXM2EvSi+ZB4jCHwV6Xd2f7B5PJNN8GdmaDh4Gi?= =?us-ascii?Q?rQ=3D=3D?= X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: 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 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: f59aea67-cdfd-4c90-ebb0-08db5315cb31 X-MS-Exchange-CrossTenant-AuthSource: SN6PR10MB3022.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 May 2023 18:22:07.3604 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: yXH+R8BBZpvlWUX3bChksYNRJra/bdyrwjliu+74vCdV+sQoQD/iGG/YLwmYn1jUv9HxESomsYtTafiohifV2Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH0PR10MB5211 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-05-12_11,2023-05-05_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 malwarescore=0 adultscore=0 mlxscore=0 bulkscore=0 suspectscore=0 spamscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305120153 X-Proofpoint-GUID: Hx6wEiZWuaReDwrQEyYeIAZ1M5o69O83 X-Proofpoint-ORIG-GUID: Hx6wEiZWuaReDwrQEyYeIAZ1M5o69O83 X-Stat-Signature: 41qimm183ahex9kfshoa3nxdr9cif7dx X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: C8903180015 X-Rspam-User: X-HE-Tag: 1683915731-725220 X-HE-Meta: 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 Bw/dTp+E J0lrDeH4hJRnkciINChHdKet+xHCXjmhZwl0m4U3Y8RmqNJDiq1H4kPDxHh1ktexleumV/ZY+F+bJDqQdSPfPFr37oOcefpyZGH4h5eDZvOHvHbn042z18M5/Jhf1OhALZOeI1tMSb5LxzcBLhVst/oQLX5nKIAsanV5jDU6ynqlUtv3Lh4awxqpV+z3EzJKiRpS0EjoUuXOuHOh8Uz53lDloUjPtrB/2Wy9y6LoZKo2yFHNQeNTp18YjTBHrTCfRAMdmCtLtKq2QSNB256vyh/LYjrWEqFZIDjnZlQVHVifxews84priJvjUwu4+KOju3i6noFU4DeocLjyRosLQEjp80Yif63SJtw35UikR7MK4b+X3MDHyPWapBsMvX1HlUiJMvY5GK2rh+9OQJQX8PHhexmfp7KygW3LvTNtDIQjpltQ= 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: Sometimes the user needs to revert to the previous slot, regardless of if it is empty or not. Add an interface to go to the previous slot. Since there can't be two consecutive NULLs in the tree, the mas_prev() function can be implemented by calling mas_prev_slot() a maximum of 2 times. Change the underlying interface to use mas_prev_slot() to align the code. Signed-off-by: Liam R. Howlett --- lib/maple_tree.c | 232 ++++++++++++++++++----------------------------- 1 file changed, 90 insertions(+), 142 deletions(-) diff --git a/lib/maple_tree.c b/lib/maple_tree.c index c69418b120179..f88c60f43afc8 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -4531,15 +4531,19 @@ static inline int mas_prev_node(struct ma_state *mas, unsigned long min) int offset, level; void __rcu **slots; struct maple_node *node; - struct maple_enode *enode; unsigned long *pivots; + unsigned long max; - if (mas_is_none(mas)) - return 0; + node = mas_mn(mas); + if (!mas->min) + goto no_entry; + + max = mas->min - 1; + if (max < min) + goto no_entry; level = 0; do { - node = mas_mn(mas); if (ma_is_root(node)) goto no_entry; @@ -4548,64 +4552,41 @@ static inline int mas_prev_node(struct ma_state *mas, unsigned long min) return 1; offset = mas->offset; level++; + node = mas_mn(mas); } while (!offset); offset--; mt = mte_node_type(mas->node); - node = mas_mn(mas); - slots = ma_slots(node, mt); - pivots = ma_pivots(node, mt); - if (unlikely(ma_dead_node(node))) - return 1; - - mas->max = pivots[offset]; - if (offset) - mas->min = pivots[offset - 1] + 1; - if (unlikely(ma_dead_node(node))) - return 1; - - if (mas->max < min) - goto no_entry_min; - while (level > 1) { level--; - enode = mas_slot(mas, slots, offset); + slots = ma_slots(node, mt); + mas->node = mas_slot(mas, slots, offset); if (unlikely(ma_dead_node(node))) return 1; - mas->node = enode; mt = mte_node_type(mas->node); node = mas_mn(mas); - slots = ma_slots(node, mt); pivots = ma_pivots(node, mt); - offset = ma_data_end(node, mt, pivots, mas->max); + offset = ma_data_end(node, mt, pivots, max); if (unlikely(ma_dead_node(node))) return 1; - - if (offset) - mas->min = pivots[offset - 1] + 1; - - if (offset < mt_pivots[mt]) - mas->max = pivots[offset]; - - if (mas->max < min) - goto no_entry; } + slots = ma_slots(node, mt); mas->node = mas_slot(mas, slots, offset); + pivots = ma_pivots(node, mt); if (unlikely(ma_dead_node(node))) return 1; + if (likely(offset)) + mas->min = pivots[offset - 1] + 1; + mas->max = max; mas->offset = mas_data_end(mas); if (unlikely(mte_dead_node(mas->node))) return 1; return 0; -no_entry_min: - mas->offset = offset; - if (offset) - mas->min = pivots[offset - 1] + 1; no_entry: if (unlikely(ma_dead_node(node))) return 1; @@ -4614,6 +4595,76 @@ static inline int mas_prev_node(struct ma_state *mas, unsigned long min) return 0; } +/* + * mas_prev_slot() - Get the entry in the previous slot + * + * @mas: The maple state + * @max: The minimum starting range + * + * Return: The entry in the previous slot which is possibly NULL + */ +void *mas_prev_slot(struct ma_state *mas, unsigned long min, bool empty) +{ + void *entry; + void __rcu **slots; + unsigned long pivot; + enum maple_type type; + unsigned long *pivots; + struct maple_node *node; + unsigned long save_point = mas->index; + +retry: + node = mas_mn(mas); + type = mte_node_type(mas->node); + pivots = ma_pivots(node, type); + if (unlikely(mas_rewalk_if_dead(mas, node, save_point))) + goto retry; + +again: + if (mas->min <= min) { + pivot = mas_safe_min(mas, pivots, mas->offset); + + if (unlikely(mas_rewalk_if_dead(mas, node, save_point))) + goto retry; + + if (pivot <= min) + return NULL; + } + + if (likely(mas->offset)) { + mas->offset--; + mas->last = mas->index - 1; + mas->index = mas_safe_min(mas, pivots, mas->offset); + } else { + if (mas_prev_node(mas, min)) { + mas_rewalk(mas, save_point); + goto retry; + } + + if (mas_is_none(mas)) + return NULL; + + mas->last = mas->max; + node = mas_mn(mas); + type = mte_node_type(mas->node); + pivots = ma_pivots(node, type); + mas->index = pivots[mas->offset - 1] + 1; + } + + slots = ma_slots(node, type); + entry = mas_slot(mas, slots, mas->offset); + if (unlikely(mas_rewalk_if_dead(mas, node, save_point))) + goto retry; + + if (likely(entry)) + return entry; + + if (!empty) + goto again; + + return entry; +} + /* * mas_next_node() - Get the next node at the same level in the tree. * @mas: The maple state @@ -4798,109 +4849,6 @@ static inline void *mas_next_entry(struct ma_state *mas, unsigned long limit) return mas_next_slot(mas, limit, false); } -/* - * mas_prev_nentry() - Get the previous node entry. - * @mas: The maple state. - * @limit: The lower limit to check for a value. - * - * Return: the entry, %NULL otherwise. - */ -static inline void *mas_prev_nentry(struct ma_state *mas, unsigned long limit, - unsigned long index) -{ - unsigned long pivot, min; - unsigned char offset, count; - struct maple_node *mn; - enum maple_type mt; - unsigned long *pivots; - void __rcu **slots; - void *entry; - -retry: - if (!mas->offset) - return NULL; - - mn = mas_mn(mas); - mt = mte_node_type(mas->node); - offset = mas->offset - 1; - slots = ma_slots(mn, mt); - pivots = ma_pivots(mn, mt); - count = ma_data_end(mn, mt, pivots, mas->max); - if (unlikely(mas_rewalk_if_dead(mas, mn, index))) - goto retry; - - offset = mas->offset - 1; - if (offset >= mt_slots[mt]) - offset = mt_slots[mt] - 1; - - if (offset >= count) { - pivot = mas->max; - offset = count; - } else { - pivot = pivots[offset]; - } - - if (unlikely(mas_rewalk_if_dead(mas, mn, index))) - goto retry; - - while (offset && !mas_slot(mas, slots, offset)) { - pivot = pivots[--offset]; - if (pivot >= limit) - break; - } - - /* - * If the slot was null but we've shifted outside the limits, then set - * the range to the last NULL. - */ - if (unlikely((pivot < limit) && (offset < mas->offset))) - pivot = pivots[++offset]; - - min = mas_safe_min(mas, pivots, offset); - entry = mas_slot(mas, slots, offset); - if (unlikely(mas_rewalk_if_dead(mas, mn, index))) - goto retry; - - mas->offset = offset; - mas->last = pivot; - mas->index = min; - return entry; -} - -static inline void *mas_prev_entry(struct ma_state *mas, unsigned long min) -{ - void *entry; - struct maple_enode *prev_enode; - unsigned char prev_offset; - - if (mas->index < min) - return NULL; - -retry: - prev_enode = mas->node; - prev_offset = mas->offset; - while (likely(!mas_is_none(mas))) { - entry = mas_prev_nentry(mas, min, mas->index); - - if (likely(entry)) - return entry; - - if (unlikely(mas->index <= min)) - return NULL; - - if (unlikely(mas_prev_node(mas, min))) { - mas_rewalk(mas, mas->index); - goto retry; - } - - mas->offset++; - } - - mas->node = prev_enode; - mas->offset = prev_offset; - return NULL; -} - /* * mas_rev_awalk() - Internal function. Reverse allocation walk. Find the * highest gap address of a given size in a given node and descend. @@ -6017,7 +5965,7 @@ void *mas_prev(struct ma_state *mas, unsigned long min) } return NULL; } - return mas_prev_entry(mas, min); + return mas_prev_slot(mas, min, false); none: mas->node = MAS_NONE; @@ -6232,8 +6180,8 @@ void *mas_find_rev(struct ma_state *mas, unsigned long min) if (mas->index < min) return NULL; - /* Retries on dead nodes handled by mas_prev_entry */ - return mas_prev_entry(mas, min); + /* Retries on dead nodes handled by mas_prev_slot */ + return mas_prev_slot(mas, min, false); none: mas->node = MAS_NONE; -- 2.39.2