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Wysocki" , "Miguel Ojeda" , "Boqun Feng" , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , "Benno Lossin" , "Andreas Hindborg" , "Trevor Gross" , "Tamir Duberstein" , =?utf-8?q?Onur_=C3=96zkan?= , "Bjorn Helgaas" , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , "Abdiel Janulgue" , "Robin Murphy" , "David Airlie" , "Simona Vetter" , "Michal Wilczynski" , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , "Danilo Krummrich" , , , , , , , Subject: Re: [PATCH v5 20/20] rust: io: implement `IoSysMap` From: "Alexandre Courbot" To: "Gary Guo" References: <20260626-io_projection-v5-0-d0961471ae50@garyguo.net> <20260626-io_projection-v5-20-d0961471ae50@garyguo.net> In-Reply-To: <20260626-io_projection-v5-20-d0961471ae50@garyguo.net> X-ClientProxiedBy: TY6P301CA0012.JPNP301.PROD.OUTLOOK.COM (2603:1096:405:3be::13) To CH2PR12MB3990.namprd12.prod.outlook.com (2603:10b6:610:28::18) 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: CH2PR12MB3990:EE_|PH7PR12MB9073:EE_ X-MS-Office365-Filtering-Correlation-Id: c71249c6-a2f3-485b-9d53-08dedafa4225 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|23010399003|10070799003|7416014|376014|4143699003|11063799006|56012099006|22082099003|18002099003; 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This serves similar > purpose of `iosys_map`. Thanks to Rust's type system, all of projection a= nd > struct read/write can be handled by the generic I/O projection mechanism > (i.e. `io_project!`, `io_read!, `io_write!`) for free, and there is no ne= ed > to provide things like `iosys_map_rd_field` or `iosys_map_wr_field`. An > enum type also makes it very easy to construct or destruct. > > This could be made more generic by implementing on a general purpose sum > type like `Either`; however this is kept specific unless a need arises th= at > warrants this to be generic over other I/O backends. > > Signed-off-by: Gary Guo Reviewed-by: Alexandre Courbot