From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) (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 439AE396562; Mon, 31 Aug 2026 20:23:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=205.220.177.32 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788207832; cv=fail; b=kLVQLZkBACmKEQCs1GNVrCUV5xJZWc/1Eew/aRkxrEWGD4B6vONSWEOyog6UzY5KhbG4d8V3eBbiBIfPkVrKYOkXaU8QvfppauEVDMHYpJzb057ENwtNUBzgWdRc9eG62CekXG+x93cpmHR69SoyB535MTLSSTFTPSubbd3aJzo= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788207832; c=relaxed/simple; bh=JsCeTIBiyQaQFX5gS1FnXO70lc5QbiOSm9Vha1G1Od8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: Content-Type:MIME-Version; b=hgEHQmT8CLDn5DPPOnrSFwUbK1QOAQ8JZpMiz408ifD1P9NpY26eL0FTUBzjB1I9Jn7pAsJc53k7TrYtcqkrxt9X5Cf23U83xfuDVj4xuyDRYLONBoq+L5lWl/ORnraKHedo4Gzh35jKpcNq0+Xg6KnNZvuhyJBEzgyycfsIsOM= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oracle.com; spf=pass smtp.mailfrom=oracle.com; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b=FSajAyj7; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b=UUylGkmH; arc=fail smtp.client-ip=205.220.177.32 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oracle.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oracle.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="FSajAyj7"; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b="UUylGkmH" Received: from pps.filterd (m0246632.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 67VGBpWU1799641; Mon, 31 Aug 2026 20:23:22 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s= corp-2025-04-25; bh=5Uky4nup1PUr2N4RqDxNphYdeI4VFHFKuRHo2tseFYk=; b= FSajAyj7CWpuAFJWI4jlSUL1EULIZaolyBDdKrAFYMGtmLJtZZnKNmi0k3prdKC8 1gRp2q2o1t2hynyrokqdcfJw+KM1OEliRIyPR4D3tYVHr01eoNflU7ulwrjraRoL P/JvEgY+y+LY8GHZJsxS1xVzKFHKaEm9I4L+n7Mr9VcETrombat6h1HDLD0VHIkM /MF7AA3JH0cH/Va0+ynROi2ZQK6Malk1EPmJgjPMxv7KOT8gkUurSDa1g38c5HRr MHMCd1vzSS0lg4YblczAjD/RVu9tRzXgBHl1zUARWy0yr55V678Hl2Rlzughu0bF FD3swGW4oFpk2pqVTNCPAA== Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.appoci.oracle.com [130.35.103.27]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 4gbq1skb3f-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 31 Aug 2026 20:23:22 +0000 (GMT) Received: from pps.filterd (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (8.18.1.7/8.18.1.7) with ESMTP id 67VKFWr7002916; Mon, 31 Aug 2026 20:23:21 GMT Received: from ch4pr04cu002.outbound.protection.outlook.com (mail-northcentralusazon11013052.outbound.protection.outlook.com [40.107.201.52]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 4gbnvpkddw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 31 Aug 2026 20:23:21 +0000 (GMT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=s2QEuSoGbAjY8ngOORZZpRXAreVj9+KhOUNE8HLnAf/W92H81b7tp50hcZSduAZx28VEq/kCiuz51ARwB58wgVwS7KGu4Iz4tC3EeDdcS87lI/tW6H/+UbT/K7wqC33JW3lyeIJ4E6LNfr0CJayCMsQyot84hhT0rlIdJ1r3/Ov/hoY5ouaA3NVr8r2RqU98XRYSeLUP/VxO5LyIUw+PGPJdwK2DzoHo2U5N7Q7c9aF4Gwmo642v0Suc21geBHKcG8Hama/d7WCxBX9NOf/zpBTIOxfR/FiKjMfyRMyzj5ap1DJ8Mv+3M5tuOjax/rF4cGL3AtBNwlt1fle3Jhg3Cg== 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=5Uky4nup1PUr2N4RqDxNphYdeI4VFHFKuRHo2tseFYk=; b=x3SNhTr1r8J2eJ0UgiwDd8luA2xqRmDYyDc42LeJGI8ahcSst6lYA7iTQCzEhZ9Q+TqWsmfrf66ZyELVwIgF2jocaEjpEg+AMgHVanYWK2LIA93TLTPW1ynb/vAJMuc8GfR+uS2T1A7ESGpGYnukvQFBT6K4kXj4IE3eTvsIFJnkanajj+8xv8CBzz1kKxMET8pDYr8d0MZgt9+tSeOeRMRvcwRIPItZDiZU9OP4dn5V7JRREt9uXPRaw8x8W2y4UwAUIznhNYQzerWerzzPoF2v5ncAlCbgb7ZWVZlYCTPXO4fEjYd8NBUUD3IpBm4IY2WIK3C60jFp0Lt8ZYj35Q== 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=5Uky4nup1PUr2N4RqDxNphYdeI4VFHFKuRHo2tseFYk=; b=UUylGkmH+YBIcjZPgTdGxIpTQoLBYr57UfDR8WGkdOUrsMNiLotdN5yD3u/CmZH7Ui7A1SH4tqznalsmRWxq6t40AtfhGcgsi5Q11+TN7SG1hWc9KETfB+Trv7RTlH/P3EiMwVJhIjIm2b8iMlY1pRyYsmaYlh5gukuCE7PlCvc= Received: from CO6PR10MB5409.namprd10.prod.outlook.com (2603:10b6:5:357::14) by IA1PR10MB964822.namprd10.prod.outlook.com (2603:10b6:208:5ac::24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.382.10; Mon, 31 Aug 2026 20:23:18 +0000 Received: from CO6PR10MB5409.namprd10.prod.outlook.com ([fe80::3c92:21f3:96a:b574]) by CO6PR10MB5409.namprd10.prod.outlook.com ([fe80::3c92:21f3:96a:b574%6]) with mapi id 15.21.0382.007; Mon, 31 Aug 2026 20:23:18 +0000 From: Ankur Arora To: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org, bpf@vger.kernel.org Cc: arnd@arndb.de, catalin.marinas@arm.com, will@kernel.org, peterz@infradead.org, akpm@linux-foundation.org, mark.rutland@arm.com, harisokn@amazon.com, cl@gentwo.org, ast@kernel.org, rafael@kernel.org, daniel.lezcano@linaro.org, memxor@gmail.com, zhenglifeng1@huawei.com, xueshuai@linux.alibaba.com, rdunlap@infradead.org, david.laight.linux@gmail.com, broonie@kernel.org, joao.m.martins@oracle.com, boris.ostrovsky@oracle.com, konrad.wilk@oracle.com, ashok.bhat@arm.com, Ankur Arora Subject: [PATCH v15 09/16] bpf/rqspinlock: switch check_timeout() to a clock interface Date: Mon, 31 Aug 2026 13:22:44 -0700 Message-Id: <20260831202251.305046-10-ankur.a.arora@oracle.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20260831202251.305046-1-ankur.a.arora@oracle.com> References: <20260831202251.305046-1-ankur.a.arora@oracle.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: MW4PR04CA0139.namprd04.prod.outlook.com (2603:10b6:303:84::24) To CO6PR10MB5409.namprd10.prod.outlook.com (2603:10b6:5:357::14) Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO6PR10MB5409:EE_|IA1PR10MB964822:EE_ X-MS-Office365-Filtering-Correlation-Id: e37a1556-6fdb-462a-fb09-08df079db1f1 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|376014|23010399003|366016|56012099006|10067099003|6133799003|22082099003|18002099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:CO6PR10MB5409.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(7416014)(376014)(23010399003)(366016)(56012099006)(10067099003)(6133799003)(22082099003)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?GWeubgj9yRwirRcz5x6bBw6YK+YzoVHXfaOSyWL3ij6xM7cmNU4gaOL9V9q8?= =?us-ascii?Q?uzzS5b1tcpwvVTacbjsniYCCx8N9VElm4o6V3gKy1kMpvADmT9xzrqqHG+S4?= =?us-ascii?Q?HUvBZGf1m/c2r8DNf9AHiz/pxHSWjG/g4oLIkm9ANRl/aKqyQdg9Bc8EGTeT?= =?us-ascii?Q?+Y0pGbw1KtcsDg1DjZp2JYLbAG+kflh+HfKMMAOSAmWA+Qtf0SI8q6eqxBnJ?= =?us-ascii?Q?u4hfRrNqdM4t60mhKDOxfMaQmnSaDCOTL8WUxRYyALLIM24HHuCfNDlmfTD6?= =?us-ascii?Q?rXRzBio2DUX7i7pmKO2+Mx2DZVJHC13kGnhNu+BCuLvPINlcLc77qEYMGoq6?= =?us-ascii?Q?C+6mQcSNApN/dMaD3bP+QmIiJ3Wt1xDQJWqq5mNJ6lnfvNP3EYiFt6bRnQKq?= =?us-ascii?Q?Lv3gUtwkPFjEL8SzuSFgKEcXIpHYtf7/TXyW1S2bLzhi590NQygCfPl/jAi4?= =?us-ascii?Q?h/eZlf62O6uvqjLU9fqRh71yW0pzx7o7sjUwVTx6d1RhNzPQ02ZDvRSkzSuY?= =?us-ascii?Q?OSG81P3zxcqwL6bimYjBQuUHRZ1TAmzB+Xs+SkfKeixbKBLcbVoF/qnKZUp5?= =?us-ascii?Q?cS61VQXfQQw9cYKCW1D8uR8ipNqAL7WvjM6r5pv4Vr6hyaGb7V92bB1NY7gx?= =?us-ascii?Q?Z0/G0Vtim9V7eMOmE9iY6kgiipCA31iMfBw7j4SCiCEZ8GzFoGIrdFF/59cA?= =?us-ascii?Q?i33pHQ1+dDYbMP+PLmfgo9hEqh1nc9qmjyxIBBzW+iNhbpivdcbS7+YhnCAu?= =?us-ascii?Q?ldFTJvd/7U/Icjk/wri7tNznm/VHtufDlMVEZDv9DL2bdC1rUZgxQGLC3qEp?= =?us-ascii?Q?ym4R51CjozpGTAH1m3NNNViWGghiNvlzpvYK83ggk0I5RjVvus2XoSGsJ3mW?= =?us-ascii?Q?l5BP8X1o/FBnqRQ4mx6ilh7iXxgMqu0sHMGY8lI1/helLqeyHqmgx7zxCvcX?= =?us-ascii?Q?kQo6RrSJ1sli4uR2uDCG2i+sXQpZ8m0uddZ2L0HMcU0r13NsLutC4b1vtAwZ?= =?us-ascii?Q?CCYzhnVRtt/K6QH+R8rXllJ88mmFuyfS8zlmpA1Ua8RF57g7cUU9/bMTiS+b?= =?us-ascii?Q?Zpy+iCGY/R22gkkipBF470Ciw6x6jLMq8cpTiAJ7ORMHXJ4H0s7KZ7Rie8eW?= =?us-ascii?Q?4PeQmneP/Nab4+RvysHNDly+nIgO6JnRCrsne1qjhKz9T38doco2xAwrm5MP?= =?us-ascii?Q?T2NXAOlMb5JEW3whU56eJJDADyuzLcneghF8Sku5zhqKv35M420fwOSPIDug?= =?us-ascii?Q?ivXs9odjBCSMmH5oqgCMoEVtV7CjUZr+0xlJ0q1HUZHPOUiaoLJRRSexAhkw?= =?us-ascii?Q?oRFeOmWnZyEFw+yrlZjJV72lLJvA/sfALKS7FWgz0f56vD7eqJAK2owvvpTx?= =?us-ascii?Q?OR3LaKrBW+v7u9S7hPXrfEGgNrLSZKb5zI97OG8GgPPeisx1pQQ5BSB+FBIr?= =?us-ascii?Q?wW7jAeTA1jU1bMpZs/Nub4UVPFUo7o3tj5504fw5szK9DMeFl/gd2m9o6hJd?= =?us-ascii?Q?3BLBhE0pjSKXlfO0CLehprW89iWhZHoHY/PEdKlcAbOY8U4HtiisLGOdPqPw?= =?us-ascii?Q?/yvCECxocC1yl1o52yojY7wxVIEKYx8IS3sJhPCgWr4oJP2SCGn9FXomm6DV?= =?us-ascii?Q?Sz9HJIHskjdqbJFul5sf4BS9tqLEL0HXabZqJ7cQfmPiYlLpLwdjIWtgE9H9?= =?us-ascii?Q?ILBzc67fzYtiFLaHpNZTWTSJayvJRAJx8y3vK8+479u4dscO+qN2i3d5dd5x?= =?us-ascii?Q?jEP/U3Ay90Iz6z9zItP4LSjNfN1lVtM=3D?= X-Exchange-RoutingPolicyChecked: 0P/YAngWXkv5HoDLGlwVgJOi7bk9fZX0zztekSKlILxgHtaEutU2Dlv2aCyCaMEmbE7rOB+hZn56lmmTrh7LUYM+8hhpY6VDa4hBThWkKEJ320Q5la9BvtMOH14tYVo+JAfCHGqpGGI/EqAeo81hcpn03xdSEh7o+jY/SriDUtkQ7Q+Ay+W9n4nfnXkpRCn2w8gNyPpeftfepJj7ccBW+i/lADMvEjJQ+KORvz5ecC9AvkqCWWiVEUM7ySiO/zmDiutsXsQq5mKX9s0qNnSr6xU778vu0KpOzB2pJFm6gJMyrnonOpYTGOmEQd9ffuKy1s6JqvtqirMdoacXM29GOw== 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: e37a1556-6fdb-462a-fb09-08df079db1f1 X-MS-Exchange-CrossTenant-AuthSource: CO6PR10MB5409.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Aug 2026 20:23:18.7633 (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: ooH0bQEAJW+Q/0S9efN6KUEVLSyPXWA6GYnU5ziLNxOVp/5dPv8u0W5mWhQPIL+tmbsosfOSfkGJfBhQhQQ6wq2whM/187c+BD/S/asQ/hk= X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR10MB964822 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-31_06,2026-08-31_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 mlxlogscore=999 mlxscore=0 spamscore=0 adultscore=0 lowpriorityscore=0 phishscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2606160000 definitions=main-2608310175 X-Authority-Analysis: v=2.4 cv=Vp0Txe2n c=1 sm=1 tr=0 ts=6a95e2ba b=1 cx=c_pps a=qoll8+KPOyaMroiJ2sR5sw==:117 a=qoll8+KPOyaMroiJ2sR5sw==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=xqWC_Br6kY4A:10 a=Sv0fKeRqtYgA:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=jiCTI4zE5U7BLdzWsZGv:22 a=3I1J8UUJPc9JN9BFgKH3:22 a=VwQbUJbxAAAA:8 a=pGLkceISAAAA:8 a=yPCof4ZbAAAA:8 a=LqkqbBbWekfmbT-3qckA:9 a=5yU3S35YU4bGjq-dph-N:22 a=Bho9c0fBagfJEIQBS7DQ:22 cc=ntf awl=host:12102 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODMxMDE3NiBTYWx0ZWRfX1dInFC/6RY0s xwLUtlvPwih9tLMDooIg86oPcGjHzmqJCrx5fALrOOKMCSf2UVlHZFwexDIGD0QJF6taTb6KL9c NBgkozcXMP/ImEF/QEW6aEyVR/tYdphHN/YoJ7/V22KdqpIU/7A21Tck2cZ3jK6mL80Bh54esnq tkY82zir8so7aktqXuqF3FlwVm70baWUqqvOr3x4tdGj/xyHOgFAyfDvmlAPgFCHf0DJ5z5/6rn V3kP2rM6APAFeJfKujf0tIrpcrh8iPJmY+VNL7jF/L9etFn3fHIcLYooqSilnT4gEqTajGFptj5 cqUIr5R08MsqVPID+n3wnSNLEvvRxvm0+m55gtuIcoGLzfl8L+wB893AknMKZyzJG6jXL5ClqCZ VWSAcT+6v4Q+BOts1HQ7qJUOoPsH3UJ79K0T3v8GEcPFQirgMgfl+xqCMa/JlfhGNPJKe+3QWRi atbET9SVUaCu5ZFybnZruN7MI1uCEW1HdgYutMp4= X-Proofpoint-Spam-Info: AW1haW4tMjYwODMxMDE3NiBTYWx0ZWRfXwxNeYLUSLfme FJDPwPLJd3dMYlvXz8CEI0zP+wcBEU9/RG2NjlXKtMk4rXsfr8OAVJF7SrCFQlJXPYPUV2HePrI OKIpQ9W5fl7uMzgRxezjGHs4ltBI8Lpgn/kv9vbH16YMZQmZDRu5 X-Proofpoint-ORIG-GUID: dP_K53jZxJc3ShcvmGO-ls5yXLOsuwWf X-Proofpoint-GUID: dP_K53jZxJc3ShcvmGO-ls5yXLOsuwWf check_timeout() gets the current time value and depending on how much time has passed, checks for deadlock or times out, returning 0 or -errno on deadlock or timeout. Switch this out to a clock style interface, where it functions as a clock in the "lock-domain", returning the current time until a deadlock or timeout occurs. Once a deadlock or timeout has occurred, it stops functioning as a clock and returns error. Also adjust the RES_CHECK_TIMEOUT macro to discard the clock value when updating the explicit return status. Cc: bpf@vger.kernel.org Cc: Kumar Kartikeya Dwivedi Cc: Alexei Starovoitov Acked-by: Kumar Kartikeya Dwivedi Signed-off-by: Ankur Arora --- kernel/bpf/rqspinlock.c | 45 +++++++++++++++++++++++++++-------------- 1 file changed, 30 insertions(+), 15 deletions(-) diff --git a/kernel/bpf/rqspinlock.c b/kernel/bpf/rqspinlock.c index 111ec80ea958..1b249c6f0674 100644 --- a/kernel/bpf/rqspinlock.c +++ b/kernel/bpf/rqspinlock.c @@ -196,8 +196,12 @@ static noinline int check_deadlock_ABBA(rqspinlock_t *lock, u32 mask) return 0; } -static noinline int check_timeout(rqspinlock_t *lock, u32 mask, - struct rqspinlock_timeout *ts) +/* + * Returns current monotonic time in ns on success or, negative errno + * value on failure due to timeout expiration or detection of deadlock. + */ +static noinline s64 clock_deadlock(rqspinlock_t *lock, u32 mask, + struct rqspinlock_timeout *ts) { u64 prev = ts->cur; u64 time; @@ -207,7 +211,7 @@ static noinline int check_timeout(rqspinlock_t *lock, u32 mask, return -EDEADLK; ts->cur = ktime_get_mono_fast_ns(); ts->timeout_end = ts->cur + ts->duration; - return 0; + return (s64)ts->cur; } time = ktime_get_mono_fast_ns(); @@ -219,11 +223,15 @@ static noinline int check_timeout(rqspinlock_t *lock, u32 mask, * checks. */ if (prev + NSEC_PER_MSEC < time) { + int ret; ts->cur = time; - return check_deadlock_ABBA(lock, mask); + ret = check_deadlock_ABBA(lock, mask); + if (ret) + return ret; + } - return 0; + return (s64)time; } /* @@ -231,15 +239,22 @@ static noinline int check_timeout(rqspinlock_t *lock, u32 mask, * as the macro does internal amortization for us. */ #ifndef res_smp_cond_load_acquire -#define RES_CHECK_TIMEOUT(ts, ret, mask) \ - ({ \ - if (!(ts).spin++) \ - (ret) = check_timeout((lock), (mask), &(ts)); \ - (ret); \ +#define RES_CHECK_TIMEOUT(ts, ret, mask) \ + ({ \ + s64 __timeval_err = 0; \ + if (!(ts).spin++) \ + __timeval_err = clock_deadlock((lock), (mask), &(ts)); \ + (ret) = __timeval_err < 0 ? __timeval_err : 0; \ + __timeval_err; \ }) #else -#define RES_CHECK_TIMEOUT(ts, ret, mask) \ - ({ (ret) = check_timeout((lock), (mask), &(ts)); }) +#define RES_CHECK_TIMEOUT(ts, ret, mask) \ + ({ \ + s64 __timeval_err; \ + __timeval_err = clock_deadlock((lock), (mask), &(ts)); \ + (ret) = __timeval_err < 0 ? __timeval_err : 0; \ + __timeval_err; \ + }) #endif /* @@ -281,7 +296,7 @@ int __lockfunc resilient_tas_spin_lock(rqspinlock_t *lock) val = atomic_read(&lock->val); if (val || !atomic_try_cmpxchg(&lock->val, &val, 1)) { - if (RES_CHECK_TIMEOUT(ts, ret, ~0u)) + if (RES_CHECK_TIMEOUT(ts, ret, ~0u) < 0) goto out; cpu_relax(); goto retry; @@ -406,7 +421,7 @@ int __lockfunc resilient_queued_spin_lock_slowpath(rqspinlock_t *lock, u32 val) */ if (val & _Q_LOCKED_MASK) { RES_RESET_TIMEOUT(ts, RES_DEF_TIMEOUT); - res_smp_cond_load_acquire(&lock->locked, !VAL || RES_CHECK_TIMEOUT(ts, ret, _Q_LOCKED_MASK)); + res_smp_cond_load_acquire(&lock->locked, !VAL || RES_CHECK_TIMEOUT(ts, ret, _Q_LOCKED_MASK) < 0); } if (ret) { @@ -568,7 +583,7 @@ int __lockfunc resilient_queued_spin_lock_slowpath(rqspinlock_t *lock, u32 val) */ RES_RESET_TIMEOUT(ts, RES_DEF_TIMEOUT * 2); val = res_atomic_cond_read_acquire(&lock->val, !(VAL & _Q_LOCKED_PENDING_MASK) || - RES_CHECK_TIMEOUT(ts, ret, _Q_LOCKED_PENDING_MASK)); + RES_CHECK_TIMEOUT(ts, ret, _Q_LOCKED_PENDING_MASK) < 0); /* Disable queue destruction when we detect deadlocks. */ if (ret == -EDEADLK) { -- 2.43.7