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CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc7edge1.nvidia.com; CAT:NONE; SFS:(13230040)(82310400026)(376014)(36860700013)(7416014)(1800799024); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Nov 2025 19:58:09.1002 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: c6e244a8-a934-46be-85d3-08de26dccc16 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.118.232]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF000075F1.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR12MB7338 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Tue, Nov 18, 2025 at 03:44:01PM -0400, Jason Gunthorpe wrote: > On Thu, Nov 13, 2025 at 04:05:09PM -0800, Nicolin Chen wrote: > > > -struct iopt_pages *iopt_alloc_file_pages(struct file *file, unsigned long start, > > > +struct iopt_pages *iopt_alloc_file_pages(struct file *file, > > > + unsigned long start_byte, > > > + unsigned long start, > > > unsigned long length, bool writable); > > > > Passing in start_byte looks like a cleanup to me, aligning with > > what iopt_map_common() has. > > > Since we are doing this cleanup, maybe we could follow the same > > sequence: xxx, start, length, start_byte, writable? > > ?? > > static int iopt_map_common(struct iommufd_ctx *ictx, struct io_pagetable *iopt, > struct iopt_pages *pages, unsigned long *iova, > unsigned long length, unsigned long start_byte, > int iommu_prot, unsigned int flags) > > Not the same arguments, we don't pass start and start_byte there? I found that iopt_map_common() has a "start_byte" following the "length". So, wondering if it'd be cleaner to do the same. But, yes, they are slightly different. Let's keep it as-is then. Thanks Nicolin