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Mon, 16 Mar 2026 12:14:10 -0500 Received: from [172.31.184.125] (10.180.168.240) by satlexmb08.amd.com (10.181.42.217) with Microsoft SMTP Server id 15.2.2562.17 via Frontend Transport; Mon, 16 Mar 2026 12:14:01 -0500 Message-ID: <5fed07a3-71dd-4966-8927-e2c49d53740f@amd.com> Date: Mon, 16 Mar 2026 22:43:59 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH v2 3/7] arm64/runtime-const: Use aarch64_insn_patch_text_nosync() for patching To: David Laight CC: Thomas Gleixner , Ingo Molnar , Peter Zijlstra , Sebastian Andrzej Siewior , Catalin Marinas , Will Deacon , Darren Hart , Davidlohr Bueso , =?UTF-8?Q?Andr=C3=A9_Almeida?= , , , , , , Jisheng Zhang References: <20260316052401.18910-1-kprateek.nayak@amd.com> <20260316052401.18910-4-kprateek.nayak@amd.com> <20260316115224.036e0351@pumpkin> Content-Language: en-US From: K Prateek Nayak In-Reply-To: <20260316115224.036e0351@pumpkin> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA2PEPF00003AE6:EE_|CY5PR12MB6179:EE_ X-MS-Office365-Filtering-Correlation-Id: d2a2d69d-0e81-40c9-f5fb-08de837f70c3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|1800799024|7416014|376014|36860700016|18002099003|22082099003|56012099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: xaWS6fQEF+jpiUZw/EoN9IjNS3GZq8Owawa9QaOL6NkrimYtjFzQJgqWJi9YiR02d4iA96L+eQf/50hpB68+nz0y3tvboaWdnt2Z2ILrImzjxZmsoBeKuqeayhYrtvdnQNComwdkLkrYz8FQxsmmfVfw1PEjgaRJvltyWvSDF6f3xKDsl+lmvJXmqKxwFQUzqzhzGqUQ2ZwIm3bQjuIwx2uQqkwVafuxFEGXP2MfvByKZTa6SDjhBnwiV8Uw4g08zFy+LcVnHCZ0fU3mqaEpslx0QnMMkaDp9LqIHhk5Q7fLH6m2t2YXrxnSoVcty/mnqep55HIiWsCmEKlSExyVMnBsePXHu+7tLcZymYxSWcyBTbGDQMhDroH8mEoqz3PAtQDIoCV+SXSdvx68MDYvGAzd1z2g9HjCUhHsmQ6xcMwtAPj0kdGpNIkzxWNruX3p X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Mar 2026 17:14:10.8515 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d2a2d69d-0e81-40c9-f5fb-08de837f70c3 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SA2PEPF00003AE6.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY5PR12MB6179 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260316_101417_039096_C6010DE4 X-CRM114-Status: GOOD ( 11.50 ) 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 Hello David, On 3/16/2026 5:22 PM, David Laight wrote: >> The current scheme to directly patch the kernel text for runtime >> constants runs into the following issue with futex adapted to using >> runtime constants on arm64: > > Doesn't this need to come before the previous patch? My rationale was that this didn't make a difference until the final futex changes so I didn't pay much attention to how they were ordered. I will rearrange these the other way around in the next version to keep this independent of introduction of runtime_const_mask_32(). Thank you again for taking a look at the series. -- Thanks and Regards, Prateek