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Howlett" , Andrew Morton , Greg Kroah-Hartman , Arnd Bergmann , Jann Horn , Suren Baghdasaryan , Alex Gaynor , Boqun Feng , " =?UTF-8?B?QmrDtnJu?= Roy Baron" , Benno Lossin , Andreas Hindborg , Trevor Gross , linux-kernel@vger.kernel.org, linux-mm@kvack.org, rust-for-linux@vger.kernel.org Subject: Re: [PATCH v14 2/8] mm: rust: add vm_area_struct methods that require read access Message-ID: <20250225160102.3cb44599@eugeo> In-Reply-To: <20250213-vma-v14-2-b29c47ab21f5@google.com> References: <20250213-vma-v14-0-b29c47ab21f5@google.com> <20250213-vma-v14-2-b29c47ab21f5@google.com> X-Mailer: Claws Mail 4.3.0 (GTK 3.24.43; x86_64-pc-linux-gnu) Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-ClientProxiedBy: LO4P265CA0185.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:311::14) To LO2P265MB5183.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:253::10) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LO2P265MB5183:EE_|CWXP265MB5491:EE_ X-MS-Office365-Filtering-Correlation-Id: a65adb10-839d-45c2-74a0-08dd55b59d0e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|10070799003|1800799024|376014|7416014|7053199007; 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Here, read access means that you hold either > the mmap read lock or the vma read lock (or stronger). > > Additionally, a vma_lookup method is added to the mmap read guard, which > enables you to obtain a &VmaRef in safe Rust code. > > This patch only provides a way to lock the mmap read lock, but a > follow-up patch also provides a way to just lock the vma read lock. > > Acked-by: Lorenzo Stoakes > Reviewed-by: Jann Horn > Reviewed-by: Andreas Hindborg > Signed-off-by: Alice Ryhl Reviewed-by: Gary Guo > --- > rust/helpers/mm.c | 6 ++ > rust/kernel/mm.rs | 23 ++++++ > rust/kernel/mm/virt.rs | 210 +++++++++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 239 insertions(+)