From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) (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 739D0357714; Wed, 11 Feb 2026 23:14:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=205.220.165.32 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770851649; cv=fail; b=dx1qexfAO07nxmLnZr56LEeW9YJYAG55Lki4ApkDUxsKermDgV7YyhZgwosdlF/iy3ZO/FSbGiYgZ5KvMjy3rwDb4BiYEeF9zs373O0/BDU24vjl9XxMz/e8iHDd0r3dD1VvRVqw4St2o5a2ujGm7hRZYUQsBQb7B1mgWbFyn0E= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770851649; c=relaxed/simple; bh=/Pm25qx1PzNY0AoSNIL1PLaEmAr/43yDOL+L/3qz2Mc=; h=References:From:To:Cc:Subject:In-reply-to:Date:Message-ID: Content-Type:MIME-Version; b=S7xr6IlAz28cOXzTwcI1fPPLgEPRCscbOSVqXtX7uX86cHDA+kB/yht0eNavsLWgUJiPjgHChtxe5FNy4swGYwAstm71X2W19eOOWw9k/CqMXW96+EPdQJ56AfssO9lxpLq1wHSmwf8JVRTl8OSXiQBQZbwgGh1Ovwp+BUpI7iI= 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=j92n3MxA; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b=vXpmvYXH; arc=fail smtp.client-ip=205.220.165.32 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="j92n3MxA"; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b="vXpmvYXH" Received: from pps.filterd (m0246629.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 61BNDYrq3163450; Wed, 11 Feb 2026 23:13:37 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=cc :content-type:date:from:in-reply-to:message-id:mime-version :references:subject:to; s=corp-2025-04-25; bh=AbWPnRL3pLZCPD3w7K yMooYhIQcW5qi7viiYLsJM9ZE=; b=j92n3MxAuVMxSxeIwcF5tJcgX2VWR5nSr4 etzJSxJqCTAmXIx0Aanuj3MQSoTN1/wt5iVSCSkOamtA/bnUI8rXlppJp1lGQWnO Tg+b/phdaHeK57FhXugYp/PKtIDa+RuEWRtkqea2ULc7oO6yMMV/22dwlOI7UHxH EGqhRFobCT1RruvTGruTqbcOHCbAT2fEJhvFjYV3cwRz+ZhE2AipxF/89AGSmdur VPWNZoEGJe5RrX6gozfuRR+IH1E3HhzaV4x8Va7nSB9PUCooChH13aueHgO+Puwo oXpFEQjqCg1x8sXbxLFEqkC1+DOWb070mvoc4WBOlt0rpfgts7xw== Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.appoci.oracle.com [130.35.103.27]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 4c5xh8xw3a-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 11 Feb 2026 23:13:37 +0000 (GMT) Received: from pps.filterd (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (8.18.1.2/8.18.1.2) with ESMTP id 61BLDn1r022690; Wed, 11 Feb 2026 23:13:35 GMT Received: from ph0pr06cu001.outbound.protection.outlook.com (mail-westus3azon11011019.outbound.protection.outlook.com [40.107.208.19]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 4c828c69p5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 11 Feb 2026 23:13:35 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=qgKzYxf59/0Dnf0CpgB+J10bA6ImFycROdI9t2B3mXhv7puJaYL3dyWZT67RHLrMICAb/9QHrdEGFL7B1nX36ErcpkOnpg70d0PmN3BbcWs2xmp2OQowbnQ9r9Cf23BAWD4UYANZ6LJhcEAxw9wI4LLpFfK8jITJ8gK8h7tKjVoVlLPOnA0OkymLjJpjHQtuEWhUAmbOCcRRjdJlmAVxnc10odsiqwSHsT4J77eggdPjnYRWdgPNJ8R4lXkdwgHdmqlplLOCnC0Lx3yOfKejIHpJrqs2HVCzxtIshWugbXtA8gJPjd8tjeWyLW/dpzCOIYLFAR8PFdGGDxlFSRX3dA== 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=AbWPnRL3pLZCPD3w7KyMooYhIQcW5qi7viiYLsJM9ZE=; b=XYIICNSnrK/rxZtq2IKPT07mK9d29HLE8ifMw23oLm7bD3l+ResY6xW3tVYuQfcyKWkjlu5tMYth2uOBFSpnYsC0dQ25ZChfZtHifrlfWKGnscR/uh634Wi9kBt+mvfFZcWnfBU2No/4sEK4+kpVNROWCa8iIq3byj/zU/bKU+04xnPHG7WhVWvk60zXy5Ci/f4OwjSXawT9iRf06IJ2Ab2+uNXXhIj+HVsyY5z/zHmllv/kQo0YUZsEEy8yK2vqNMgrRGgRvDgUx7hooB9G22ETdnSdrKuyBIKBxrx1K6b5+sssZSPfTk55zB/+A+EN3aMGAdy6SxpW8Z20UDE/iA== 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=AbWPnRL3pLZCPD3w7KyMooYhIQcW5qi7viiYLsJM9ZE=; b=vXpmvYXH/GFRkYHqHmSHETY7PrpZVZByTBm9YoEsGi8wSjobdKQTS2dwo6ojOWgN4qMRQvRZ8rW77wOXeq6IlZv8Ky8dEf5dBTOGuXkRHRciWUtHQrPk487N/qiga5XfQz5hw6C11PzVfsZX/28wW7/5CuWoXD9DSh2Cz/UrRsI= Received: from CO6PR10MB5409.namprd10.prod.outlook.com (2603:10b6:5:357::14) by SJ0PR10MB5598.namprd10.prod.outlook.com (2603:10b6:a03:3d9::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9587.19; Wed, 11 Feb 2026 23:13:16 +0000 Received: from CO6PR10MB5409.namprd10.prod.outlook.com ([fe80::3c92:21f3:96a:b574]) by CO6PR10MB5409.namprd10.prod.outlook.com ([fe80::3c92:21f3:96a:b574%4]) with mapi id 15.20.9611.008; Wed, 11 Feb 2026 23:13:16 +0000 References: <20260209023153.2661784-1-ankur.a.arora@oracle.com> <20260209023153.2661784-5-ankur.a.arora@oracle.com> User-agent: mu4e 1.4.10; emacs 27.2 From: Ankur Arora To: Catalin Marinas Cc: Ankur Arora , 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, arnd@arndb.de, 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, joao.m.martins@oracle.com, boris.ostrovsky@oracle.com, konrad.wilk@oracle.com Subject: Re: [PATCH v9 04/12] arm64: support WFET in smp_cond_load_relaxed_timeout() In-reply-to: Date: Wed, 11 Feb 2026 15:13:14 -0800 Message-ID: <878qcy98mt.fsf@oracle.com> Content-Type: text/plain X-ClientProxiedBy: MW4PR04CA0227.namprd04.prod.outlook.com (2603:10b6:303:87::22) To CO6PR10MB5409.namprd10.prod.outlook.com (2603:10b6:5:357::14) 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: CO6PR10MB5409:EE_|SJ0PR10MB5598:EE_ X-MS-Office365-Filtering-Correlation-Id: 436599f1-4eaf-45e6-ed29-08de69c32300 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|366016|1800799024|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?splDYnEbYAnfNlnrtYAixW6suDf1rpk6jHe4hDtr2xW64TjnEfRdSQ8M7dL1?= =?us-ascii?Q?z1QPX4QKzvk0RVRVbwQgrZNUiYgj+zGzwP6Ac5y3ivFY48uXz1do9iQkS32w?= =?us-ascii?Q?5byoXV52olxh0peloXj8moE9U6S720YtV3/wDZ38jxPjWn5nEgyuStQ8Lom4?= =?us-ascii?Q?UWiIAc+pU+WUmiyCKrEWXl4///XmmbcoVHeNfzJzNnbkHdJ+6gIu8JC5zaqh?= =?us-ascii?Q?MlTzcBF2RQWa5LMwybEioA5nt8oSqO0tocTLXBiaEr3vlr8QSnZ0GcZf95ET?= =?us-ascii?Q?3yJdiStt529SQLxnRDgENIECazaSSgEhXCc8fkTtzeFk/XsXHRVHzveDA5hU?= =?us-ascii?Q?iOXHhcbT+aX5xy0q1mxos16yICXTl5g3T0CV7wTmP144bW72FgrvWv+kfa5B?= =?us-ascii?Q?QJu6Ha+bJvy1if9Wwsv9ruk7FEqRwCucOgyw/5L8gtbuno4dKHTBvRnT01G3?= =?us-ascii?Q?xVsaF226BmRd635xUuabmPmA5+EFyNQOUHSkMTssIi4tTuW7T4VwjAskAhau?= =?us-ascii?Q?SLR4Zbmp2Ee1HHJdn3VawJZLd0rLJXUfAWvSqyOyilTZ/pZDOd2XGo7pP8jP?= =?us-ascii?Q?oK5TwuOSU5c5qloVx/M7SNhc1DBqvw4pwDZHP5whi8/7Y4bOXpcdls1zbOVE?= =?us-ascii?Q?2j4YcmDKfJ9qAAVU54DfNqBLa0mMsEuRl1sMjuaP2NX7mno5ryh+qLOn+Ksr?= =?us-ascii?Q?l6DZc6jdAxsjacA9oxC7y3DOByG0sAg7ND65EHdxmhwx0TuCqQk190aO2K2f?= =?us-ascii?Q?wle+P4qjEOWDxDy6UV7VgarADLQHZNeN1WwF4uZ0C2wkMR23IdEYI5y3wtRW?= =?us-ascii?Q?HVtO8tQtLTwBZNX3D2D63S7Cw+7go673Vy7K+JbcEM7+RranPn1ewUgmZxU6?= =?us-ascii?Q?h8yoP15DfxFl3o3+K5/aCU9S8qMKPU67UjfkR6jUpFnGVWffa5ENPV/qM4YL?= =?us-ascii?Q?O7Pv4GpVd5IeDwbSGQeJ8wS8a117ydit95mAPcn3YHoopU//fIuuofz7Cs98?= =?us-ascii?Q?JjYN+chWf9tdklRNX002LoEzyvf/BfHT85NlrKfvJAXrjTxTqGYDJAGPnBl8?= =?us-ascii?Q?R57vv+P38JniRli4GsQt06gl33a1gXy0TMoa9byuBUX9+RRIohwAenI1iuqn?= =?us-ascii?Q?ZyT9iKUib2kIGHsstO9MPegT9dmCw+ApS0JBVIR6316Jxo+U9C/5tO4O8qk6?= =?us-ascii?Q?bjgnx8G8wEzo6yova45kG0ZuhVutWuUO7vouPJKT9ttID+xm6oOgQWY/2skI?= =?us-ascii?Q?e9BD5Q8IwC5AtvCcw41RizDlGXhcTl5MewiOcKyqvn94JZxLBXov1ktQxGCu?= =?us-ascii?Q?HpQqTMlU1nU9lWLltva1QovON6G1qWLjaHamjs3gPbfBa1LxGaWKEq2DbZnt?= =?us-ascii?Q?2c9FSLzzr5Gg7taKpXtKqV+9PUwnYakhJy16/mFqjEZhydkWxs1xX/lt9XVM?= =?us-ascii?Q?TxFCoApBNDOlbyxA7ommvPeSa786e7yrXYlKWCZzVMA+vVVbjkZkvP0TAbkm?= =?us-ascii?Q?LzxyBe13bX2MjAMjW+eVILbWTX9Agn7LuCik?= 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)(376014)(7416014)(366016)(1800799024)(7053199007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?5qSU2gslv3uMBXiutLPq1L7G/1Xp81tSJD1odV8uPUPE9Fk/F+7HAILCNW7b?= =?us-ascii?Q?QyXaphtH4zmZI323GRwK6nE07w1IcS/pQb7xflrUZqe6pVQUUhZPOLczjwzP?= =?us-ascii?Q?RSbRCNjD8BAj5nHSyMgQgYtZ0WOJoMCQZc8QOzgp1Khx/HuhIqMyOW17/Ewj?= =?us-ascii?Q?FQGu4OBRsXlgshhFF+RnXkj+2VTEYA4SUTSFfT0wPL8cZmyd6BF6OsFcOVCt?= =?us-ascii?Q?oqasBkyoGuqORy9xBQLYx8/hupdY57/INuvihRctv7mVZgS381/mDmhO+eMP?= =?us-ascii?Q?D6tnQEFXbHer7cgE/fNXOvT+p/YjfTQ8Rk3Uas39U/lngckqR26vacW22req?= =?us-ascii?Q?pCEFrWbOSf+QGqnFFrI+LNJVArU/ARCQw4fMst23gT14YpyXdLrsTTsnOuh7?= =?us-ascii?Q?Vy5XPl0bJPrvA3S2l+ZMy/sf4IUXcnUgpd+osqOXD6UuwzVKWKutrWJENpFQ?= =?us-ascii?Q?oKnMUAQWChmvsTyRuAdSB1RTeTDiMviD3/fLqJlx3HowZNwSqr5QFkrb8PZh?= =?us-ascii?Q?Ut7Ej0SRFu20XjpevklRG4/effmBxOMQCdjxK3H1jHQj1PT9cdT/ENrgBQoV?= =?us-ascii?Q?qLHueZcjb4KgGZXaCgQ6/6oV5Qs0U9aVwq1lpGD2bzldamyrR+XR6htmVX/q?= =?us-ascii?Q?lNcDgo8i89vTGn20dX9qYYoKiJmR+nFtQAXGFA7LG0Lydf3R6pCtg6CAb8Q6?= =?us-ascii?Q?YJ0CkXInfupCkImhWRDBt5pIMBXjQMCSlFJ7Lbr/SbNLcOlfUTZlXwkyqFBz?= =?us-ascii?Q?HjyuMcB1jPY270SMEUk8InQsIgTxEnb7JMGl0cgT9/CI8bKmSOJEofWmPStD?= =?us-ascii?Q?Hud20GccQljDdT9sfM4yRK+kDXA/oTlOn0j4Bz190r+FvkF/0gvT8icmjxCD?= =?us-ascii?Q?maEWlY4EoJXzu/X1Q6Bp/vyUfnqDK2oys3vtwRERwYFpBuXvOlwvezSgjThz?= =?us-ascii?Q?UqL2Trgb7Pufy+zieVw3vdJWuH/Xv/SXSzxGabgEoPiHbbon6aLz3Bj4Or+A?= =?us-ascii?Q?iASe23nvgTv7dXlxlsHTnSXywByvx3fF6R0UUOdHPWqpOajLX67AF7BAg44d?= =?us-ascii?Q?OpNKWoROrJITl7NS5P5GO67BYUrLPHuHHTtbORlbcjC3M/O8KS7ISvOZG1ye?= =?us-ascii?Q?RiUBOBFFWFzIZmjEUv+aLOUyaNl5dEPWZqfS1ZiCstxbKA323HgZvTOtEwB6?= =?us-ascii?Q?uMz74Z7qteWNR1Ev0t6062htmUo++vct1hS5kE68ix76O7ZKuig6vJNE+Q/4?= =?us-ascii?Q?B3dk9pvEf/Eoz+bfzKk/XwCtIt27RGeTx59Mpu9LkghSKblp7ELTRWzOq+KF?= =?us-ascii?Q?+BReTrPwj6/cDN0wL3JFhBdl953Ht4yoUBtuKXXycWVJdqW5BbyUT/0J7Bb3?= =?us-ascii?Q?NW1bUoUCdy3XhdyLZPUyU4qk1NsP5qOY5HSTFbrIpsIsgt5hT++mG4tsBVal?= =?us-ascii?Q?72K+clcjftXzMEmnjbf1GEooLg+TfQHuN4mhxdEbRkzESoylUOz+Ii6BwNaw?= =?us-ascii?Q?JHdfes0tIeSCanieDutTn8xEhu83HfI0alYJqjtpIfa+5XkaPFvSmJ6ojbdt?= =?us-ascii?Q?VcVntpiBhEOdkV1s5btkC6XKgvFcV8onupSs4MQ4MJtK+yIoTdlPrqjM+WWU?= =?us-ascii?Q?IgsvtlYKXf58JwmZbyfxGnje+dlS16IMUid+mITTFSmsx5JXzSc/6E8dRlJ1?= =?us-ascii?Q?q4nGgb5HdCC4uHPIeFz4CzmIN+LxhB5mu7UW5z3uLF+n57JtCy5iXT9OBKmS?= =?us-ascii?Q?YHbZl/LMeBBEXpC/bYCPFBoBDwcq9ws=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: 436599f1-4eaf-45e6-ed29-08de69c32300 X-MS-Exchange-CrossTenant-AuthSource: CO6PR10MB5409.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Feb 2026 23:13:16.1085 (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: 4OHJ7Ptxgw2jCYzwZ+LyAbwCSZu1Z1uX7bEQTkbYbiiB8K6ZEMuY7DDq9y+z5o8QK5K7CY6Gnua8mAf3hL9acwvumu4CV94BCcWi2pYx+bM= X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR10MB5598 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-11_03,2026-02-11_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 adultscore=0 phishscore=0 malwarescore=0 mlxscore=0 spamscore=0 mlxlogscore=868 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2601150000 definitions=main-2602110180 X-Authority-Analysis: v=2.4 cv=YbOwJgRf c=1 sm=1 tr=0 ts=698d0d21 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=HzLeVaNsDn8A:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=Mpw57Om8IfrbqaoTuvik:22 a=GgsMoib0sEa3-_RKJdDe:22 a=VwQbUJbxAAAA:8 a=7CQSdrXTAAAA:8 a=FD818APFoX7DtmaT_24A:9 a=a-qgeE7W1pNrGK8U0ZQC:22 cc=ntf awl=host:12149 X-Proofpoint-ORIG-GUID: msQHM7ZTiDtOrAWb_IP1LI0dmKpJkpAF X-Proofpoint-GUID: msQHM7ZTiDtOrAWb_IP1LI0dmKpJkpAF X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjExMDE3OSBTYWx0ZWRfXz/q8l1j046wf XlyNrFzcFhwuA2d9UpwIGMqghD35ANaiClI/415+yQs9A29cY66T0C+6T1XIDXByKOVuid6xw3x I9VCJSvQa+8xvmNv/wmNq6QA1dbXybGKUDE7G9wPGL4vohQf1oKAcdjO3f10v7x1zCTopB823dy YE5W4oitQqnZJCLiXj0sK9Ofp+h4mtxhfWaWC1V7libnxsyM3R98VV35oBiy4pztESeqN+8nHX+ 7AyCcCwnFAJB3fPQiV1n4sF4mGZE0D+EwwbUJIAHSQ2unfShehE5ojQmbzmshihj5Rxm4+ep95B Nut/3aoDS/lrDsj4I+tZSp9LZrFW0kxSOTu4dpjWsuzeRQVnQUvEjmQ+Bc6SGyJXtK9q0PDekqG 8iQwMNFZ5faX50Wwc5IeX1sU7v1wkPVboYLKv1r6AxVHxYqwzWcgzjlbXCtstVMlpHAQ3rlUUse 9NFvJwb6Ukhfk8+yeRMpwu+fNptGDOue8epL4IAM= Catalin Marinas writes: > On Sun, Feb 08, 2026 at 06:31:45PM -0800, Ankur Arora wrote: >> diff --git a/arch/arm64/include/asm/cmpxchg.h b/arch/arm64/include/asm/cmpxchg.h >> index d7a540736741..dfb7d10a18be 100644 >> --- a/arch/arm64/include/asm/cmpxchg.h >> +++ b/arch/arm64/include/asm/cmpxchg.h >> @@ -12,6 +12,7 @@ >> >> #include >> #include >> +#include >> >> /* >> * We need separate acquire parameters for ll/sc and lse, since the full >> @@ -208,9 +209,13 @@ __CMPXCHG_GEN(_mb) >> __cmpxchg128((ptr), (o), (n)); \ >> }) >> >> +/* Re-declared here to avoid include dependency. */ >> +extern u64 (*arch_timer_read_counter)(void); > > We have a bug in udelay() because the above might read the physical > counter while WFET uses the virtual one. See this thread: > > https://lore.kernel.org/all/ktosachvft2cgqd5qkukn275ugmhy6xrhxur4zqpdxlfr3qh5h@o3zrfnsq63od/ Oh that looks painful. Thanks for linking it. > We could use __arch_counter_get_cntvct_stable() as in Marc's suggestion > for the udelay() fix (or just wait to see the outcome of the above > thread). Yeah will follow where that goes. > The rest looks fine. Great. Thanks! -- ankur