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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: Z71oRdmj/uG70Vv6dYtTt4jsBSPoaF2wcTw7jfAJ2b/QLyGBLwZJJNwdruOK7NeIbGuT5N7cIVdJF2TVV7I1f08Y5SHmBFQuhSBEFJtUrq8462moxunkngyB7S2Dc8clo2hUZeK9GBw/f2kYQDniZV+TZSDv3nijBPQNfbLz7vJanFT1YnluwBjRGmgalWZHmCDiMmM8yo+fURJhiaXOfuUVOdxXiGmibQgwih3BzdrHWrMrt9kQ6/3wdT6HK7bXyRH6wz5/B9mtZ0YH+D8WRvYn1J6WkzUTbgccmI01rbCw1EIc9i4ZL/GyO/bwnIB2RjtJ6WJit0o1LUIK3a5EnXrnKOPs0ve9DrYSIUUivyeJmlRM0e2LtDVKNx6fzX6CzrG1AxB3sD1LsmlLrQ4T52r1Q/B+EkC57F9bbfMHMTr6IbwBqox0mdYpGBYlovES X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Nov 2026 08:30:06.7787 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 24d05a3e-000b-4f47-7812-08df3be029d2 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[4.158.2.129];Helo=[outbound-uk1.az.dlp.m.darktrace.com] X-MS-Exchange-CrossTenant-AuthSource: MAD0EPF000008B1.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR08MB5364 Hi, On 2026. 11. 06. 9:04, Christoph Hellwig wrote: > On Thu, Nov 05, 2026 at 06:16:15PM +0100, Bence Csokas wrote: >> A common usage pattern for offsetof() is the following: >> >> offsetof(typeof(*ptr), member) >> >> Condense this operation to one macro for a more maintainable code base. > > What exactly makes non-standard macros with no obvious safety benefit > more maintainable? It is written out in more detail in the msg of 1/3: it helps keep lines short, and as typeof(*ptr) may not come naturally to many, some may be compelled to write out the typename twice:: struct my_struct_type *p; off = offsetof(struct my_struct_type, member); // pointer arithmetic with p and off which induces additional work if *p's type changes. However, as Sashiko pointed out (don't know why it didn't write this earlier), struct_offset() already exists, so we should just use that one, and probably add a struct_offset_end() variant. Sorry for the noise, everyone. Bence