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 54816C43327 for ; Thu, 2 Jul 2026 01:35:18 +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:Content-Type: Content-Transfer-Encoding:References:In-Reply-To:Message-Id:Date:Subject:Cc: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=gB/bbdqh/0Sfqj/AUZ1l/h5lMgMMBqCVKXeuXLr0klk=; b=ZuJnQL7qDNIgnNjIAc7qq/PgsL 5tL1k4oRvALrCJuN1uu2JjmchfMhkaRV5wpzsF9DXB/JvfV8OEblNt9vVQq2yzMbsVYjxx0711hu8 46UycFhzP+qZd3szb9A8zc0KlhtTw7rc1dmv/i54XXrPyfX2wBnFRM6hlN523WChhyock3oGHOpSa 7H9Sa8vxnYBBitzGGUR/bjcClBDH4ynCmNQ4A53IlojiyT0ru3aJaCBoCrPuD4zt99pLY/BUr37QI 0+eP9aqOFcQy4SGF7PZBWmIs6IFtnpix1FowsrSecR8DvY/6xFQVEoYIp57UguNFnA9KIRMbEg5Uv 8OmbjPkw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wf6Kd-00000003M3k-3AcA; Thu, 02 Jul 2026 01:35:11 +0000 Received: from mx0b-00069f02.pphosted.com ([205.220.177.32]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wf6Ka-00000003M0W-31IK for linux-arm-kernel@lists.infradead.org; Thu, 02 Jul 2026 01:35:10 +0000 Received: from pps.filterd (m0246631.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 661EHG202817599; Thu, 2 Jul 2026 01:34:40 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=gB/bbdqh/0Sfqj/AUZ1l/h5lMgMMBqCVKXeuXLr0klk=; b= bsA7ScQBa6z4yZPSEGeFbXnta0iUWE0/XAxCUJA7YtHLep4i7tzfjvIhkTj8Dh7k 77kagxi7k5EEDmnjlWBXAgHMvuaKclJoAWCWBvk2Rl36KArbJGXwkPG/5d2tUVZd i6aR8k9flbCfo7T95tsUayvYVZhBA800kaKS74Y3tpleT7fYV8WrpQYGRXFRv+f8 Wj+b9JHAA1vpTNRCJ3m+KYFOL6g2iXkwaWEQ5V1zwYpoWXYi3QuY581+I2Gf7s8i AUJDNUFP+elDHD8MJpUi33Lti2UMKFlPIF8HPo/rxSC5YkVTn/F5Ay19dyf9X35T jHhg+X0Er7/Jl96IS1e3Rw== Received: from phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta03.appoci.oracle.com [138.1.37.129]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 4f26jq79xq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 02 Jul 2026 01:34:40 +0000 (GMT) Received: from pps.filterd (phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (8.18.1.7/8.18.1.7) with ESMTP id 6621X6o0036152; Thu, 2 Jul 2026 01:34:39 GMT Received: from ph8pr06cu001.outbound.protection.outlook.com (mail-westus3azon11012064.outbound.protection.outlook.com [40.107.209.64]) by phxpaimrmta03.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 4f50yt4gaq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 02 Jul 2026 01:34:39 +0000 (GMT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=xmtEQwGRWxo1Zu2g4GLfnQXdpMiIvgMURuK0SkXX8vrvgTWmz0Be/8pmaSGmG48OisccMWnwVcTKQlCI8mO0RwzlpkHPp+jJ8XPb+8lJhvvnllc7q/YWEKLU2++017Mkas4NsPFnrYUYnAnxIYAEKM6vrvaFqhE0NY3EmVWnibN2RQREDfh1UvwtJyjb891QTXLvdfSumr8Ztccvf6dxOeT1pYn+ln6XSKjO4G1qAUAC192VwwmtrzdwHVX5ofFgXk7QXOZn0rrXMctcUaW8gZ1HcL5OB+GQKwkkN9ALTP/QT4Xaa7It+wFPsO9qdnJq1NfnbGT6AqnNiIMcPfH6mQ== 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=gB/bbdqh/0Sfqj/AUZ1l/h5lMgMMBqCVKXeuXLr0klk=; b=zMmtugERd/eLGNqgr5XdG+hRJ2SUR3rUcUhMJutTOOjdZDk4h8dNgGvZjBrH1F9DzWPinCNXasX6PWoiFcGB/2fopLs1MDWf48OqsOdyn1Qmjwu2nYg7JQvmDnkhFggTGz/igTHm+ncsxm61VZt8o2oOuNOLc5+nYj8t4z+V9PxN3wJSaZ75PoUSUqhWuYe5JrfsLM8fXXDa3M2ixlLz6HiQw7wNvvI5wTrWW64TNR1HtmuVPowzaI4AmrmWtsBhyGKFXq5NU8m2e+bthdqD3ysY+n3M04pOOkIvD2JCb+Lkov89E/3wUfO50GOV5rf1LUjyJavdfiRQHCBcMZIhaQ== 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=gB/bbdqh/0Sfqj/AUZ1l/h5lMgMMBqCVKXeuXLr0klk=; b=RO9zfElg27cfFx1y4bw6JocD+hMRPKHR+9t0TGuItkRAdpmWlk9jbmnruz6/Vf+Gdc/qnYpI9iJrnd1EiftmFwYPeGtDlhEsr/bigMD4v5GJoDj9EwbAR0P71Ydk88WpJ4sBHRZm4FaH1V5P9ADOy8STszI4Me8KQAVqtkh0ASs= Received: from CO6PR10MB5409.namprd10.prod.outlook.com (2603:10b6:5:357::14) by IA3PR10MB8760.namprd10.prod.outlook.com (2603:10b6:208:581::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.181.9; Thu, 2 Jul 2026 01:34:28 +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 15.21.0181.008; Thu, 2 Jul 2026 01:34:27 +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 v13 09/15] bpf/rqspinlock: switch check_timeout() to a clock interface Date: Wed, 1 Jul 2026 18:33:28 -0700 Message-Id: <20260702013334.140905-10-ankur.a.arora@oracle.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20260702013334.140905-1-ankur.a.arora@oracle.com> References: <20260702013334.140905-1-ankur.a.arora@oracle.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: YT4PR01CA0063.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:111::15) To CO6PR10MB5409.namprd10.prod.outlook.com (2603:10b6:5:357::14) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO6PR10MB5409:EE_|IA3PR10MB8760:EE_ X-MS-Office365-Filtering-Correlation-Id: 806e7423-09c5-47c7-1b0c-08ded7da0e42 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014|7416014|23010399003|6133799003|56012099006|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)(366016)(1800799024)(376014)(7416014)(23010399003)(6133799003)(56012099006)(22082099003)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?OEM16LAw5mK/Q4sk0U1MkzQ4OVmLNlEy6xYvdVAPr0jsXpgmmi23/wff4Pzu?= =?us-ascii?Q?UB9U7DlQonFG4J7BZBo0+svd4nVRb9ZxouLOhrqUZu8CDuL8tPHffz3bTm1y?= =?us-ascii?Q?uG724wX/JuZiITE/uP1gqIm6mLCQfhMTx9wIbGNC1Pfqy1ihpn/6Cbfsiflo?= =?us-ascii?Q?RZCjhApJokON5vO9onOr99RtxnFhkYLb/1UcWVeiqbNSJg3dXDgwDQTJmuMF?= =?us-ascii?Q?VHwGM9sY4z2Bl55u7Obyp/57n61cDswCNeJKeBNhUIpbsVSNKeZRyOFyEnae?= =?us-ascii?Q?PQHFW54ycdbUlCn1DeGjlCXA+8J4VlkFx4GrjGLllQleuyI+lCAtzqSQAJYo?= =?us-ascii?Q?YlZhyxJCmaOxTpsDA4K5AstMiAeUrdxLBn6GkPRKcOOjc0y2STwqzD6b6byY?= =?us-ascii?Q?6e72XqRC4ZdW3BBf0REPAm7imCpZKY+IyAwD/J/b2fT58eQ7mEjiXDo49wFE?= =?us-ascii?Q?2HdmSgWPfVNO4c8JqOYioi8loGVCX94eSR26UUmtRY2Ig8Z95hJuW5HjxFL4?= =?us-ascii?Q?TTYNbrDX4WeGveXJZa4HC2CFfRd4wMHBP//UMdSIM+7Arz3f7bVXBXSCWUSN?= =?us-ascii?Q?ifK0AlNWHzAYAkYrueM8VTBC+MsgJ8feYFAeZksa5Bqf0IfXdDhkm3rUqw26?= =?us-ascii?Q?xcynOlnFvVo/FmMnO9DIRM4ie1H9BTSToV6M+Pm6oRvBfZRSmdIMYgYgbzB1?= =?us-ascii?Q?yB7LOpYp3WThZJbLC/iClpcF7HB1MldzuhRY8LSe7KxTZkrx6OJu0zXo72px?= =?us-ascii?Q?saYXas4hj7fl6mbUO4ShAn1zKpWl/9BrgAsFPs3GEcw1N/hwa9XewrPVDqtv?= =?us-ascii?Q?NjrCM+F3+VkHpZpjdsbY1hDiF82bf6ih5KRx5UpmGYauTnLo6eNgi8ikZIUX?= =?us-ascii?Q?+FzNObguXSXnJZwuvBOTQXRgD/AbdnLNjpdkiJ1SuJ0G3RGmOqCvizUVaEdo?= =?us-ascii?Q?a6kA1p0wUhi7qa1BsosrZC8IB52QvUxfcPG6IlECfQYfmMiKq79tMAhT2ci2?= =?us-ascii?Q?rcumng5XbeRUq/U3QvlmHl4WWPBcR2at+gRk+TT+fmWXBit2g5XnmcrueDfP?= =?us-ascii?Q?y4sDhE/TnUR/WzHR/NPVDxm82BJmgKHQTE5WimjpcqKnbMvhrKVdhnIdoS3x?= =?us-ascii?Q?Gz6rJlZE/MMBM+e5FuXx+oNReOEv2NPAs/ZhRdA5YkjAQBZ3bwAiIrbaifCf?= =?us-ascii?Q?rsrfF990VkAWA4vJFRQ0e9rPL959MGpwYKjQWlhgrsnvusEFtGyMHsXG/kNT?= =?us-ascii?Q?5YRlN8ezOV3Wub07tQZEDsafuYfwVaV4VrjR6UOK1aWu+QQE9lAVJFrD+VJy?= =?us-ascii?Q?ED/eUvnB4Iahu5esTeerIx0J4ZvNzOxiEmHBIf44gSLjJxXKBgeZ4iwa4X3t?= =?us-ascii?Q?sflEhpB22xb8AujOpEw/4ETdIyfCEa+DoA8MpQfmK6ft87qgg41urA7sWM+/?= =?us-ascii?Q?0OwVofLmBFMnSvcFd3nf6j07xYsT5WyhzaUA87NUiMzWIEdykEHkmr2ZUK5c?= =?us-ascii?Q?92fkFZqZscSRkh64xQpAK7fGs9IqPmef2wR2JZfRWGSFKP5sXNflSpeHBN5O?= =?us-ascii?Q?diiIy6pnVXoQTzMLdU73X/fAq1yB8f7/7GBYTx72Vq9yRBU7cZ7FHQNq5hDT?= =?us-ascii?Q?MBTqORxMA/MkB50Yt7WITlyvQ5cBF/K3AotF2h8ZZPXXFpIogmAtFkpbz1Ii?= =?us-ascii?Q?9vKJK61kFJ1WobDRNDQYDLRTNQapJMwTMb1jQqnn2w54Dkejy1hgj/a6kYIP?= =?us-ascii?Q?5xu2pGnjb5ZmBbKIPfiyZGIAGYXeqN4=3D?= X-Exchange-RoutingPolicyChecked: P/OI4PbrmDuDt05uA0Xr7a9pe4qQzw2c9TJPgxvIXubg7YACDzeQBWE/Me/ygUzadrtsiMh/y+2NsWvlvIK/ZZZt9Oxk1Ne4hbSqgyEYVUqDSywQThgbEoYG5ZNENwRLtpuKsDCCukQHLKVsXUjlaeETRR/pIVaIVUd3QxJqCjiTdulvr3zh4T945jp3ZGKU+qj1AIugRxizu1l7YdcpUEnp4l7K/O9CvPAnUknfdFMdvcE4MZp7u8Si7MbLzWGXQr7lJzLhJbZeLNMzQTVdBCxTgehcUnhYUm7iShijon5/lgOvE+1lnGU28zCLrvLSYk9DzRJd3zMEWiJRJpxIJQ== 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: 806e7423-09c5-47c7-1b0c-08ded7da0e42 X-MS-Exchange-CrossTenant-AuthSource: CO6PR10MB5409.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Jul 2026 01:34:27.7553 (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: 5/7E3KhdFYTUxs+8J9I7Tf2VVh1LNhvUyXxTH9u6sj+dldQbtuCrEK4WhZPXd+bYWTBv3/vSucBGq3p2wexdjgF/IXBLGS3Cf4gtYTyxMZI= X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA3PR10MB8760 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-07-02_01,2026-06-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 mlxlogscore=999 bulkscore=0 phishscore=0 malwarescore=0 lowpriorityscore=0 mlxscore=0 adultscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2606160000 definitions=main-2607020013 X-Proofpoint-ORIG-GUID: o5pvbjAIr15m9SXs_Kp-rqukylupGUnv X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzAyMDAxMiBTYWx0ZWRfXyEQ/xsxQ5QTw YhUUR5Fg81p5O6rkOI9SEE3ofNX13uoAd9T7TXDF/gxKTXwLBG4GaDekZZ8PJRvRN8azxu9LNQI W+pjoOV54aLGgHlYygnbZ4lwUoJ6ymKUZMCgTh4p9sMF6+F4IT0RVWEQpcaUnetRGrIYy7VP0Ex b+BxWfZCQfOyLg0qN1tGGr3HWsQbXXs6gbkDtmkc067UJVARwFDMrdJPGDr2ioizsQwQdjurnIC qhicgwpGJyD+j8HSBjJcs38FEf4L3IBEffNDftE47VDVkxFAZv2lp/dQf1V3sC1KiWia3Rdm2iC PJaKNxghoTJFXAg0tPFq0Q9SwGv+2pfFnWo+XcxfLqGbNHyWFmuCrX6v5wBCJZlNQBFl2HYcYD6 Asbl9IDoFIz2HZd7udZ/GRlQ6NOpPHFIZUCWt1Z6yxpCpgtbDNIlPltaYiHokzvrgo3cYQtsGmH ucxQaQvnlpKAnEGT2Ag== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzAyMDAxMiBTYWx0ZWRfX3+jwjOARP4zo sCHwHJ/Xe55saSnEiYsdtNKOFS/3sLGQY5S0ylNw6XG9i6tI6WHhFW9XBCSHSjo1UBs5G5mZqvL DmSJwaCe9ZVOe7Ysg/jDgGTu+xiM0kL1lXEfYUbK6DP9Nt5ZwUYS X-Proofpoint-GUID: o5pvbjAIr15m9SXs_Kp-rqukylupGUnv X-Authority-Analysis: v=2.4 cv=XrbK/1F9 c=1 sm=1 tr=0 ts=6a45c030 b=1 cx=c_pps a=WeWmnZmh0fydH62SvGsd2A==:117 a=WeWmnZmh0fydH62SvGsd2A==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=xqWC_Br6kY4A:10 a=RAioF0-LDSMA:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=jiCTI4zE5U7BLdzWsZGv:22 a=o5oIOnhZENCTenyL_yNV:22 a=VwQbUJbxAAAA:8 a=pGLkceISAAAA:8 a=yPCof4ZbAAAA:8 a=LqkqbBbWekfmbT-3qckA:9 a=WmVTiCyuxqgg3mnwYu6p:22 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260701_183508_893993_0D2B35C4 X-CRM114-Status: GOOD ( 17.42 ) 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 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 e4e338cdb437..0ec17ebb67c1 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