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Fri, 5 Dec 2025 11:14:46 +0000 Date: Fri, 5 Dec 2025 19:14:35 +0800 From: Philip Li To: Andreas Hindborg CC: Miguel Ojeda , Daniel Gomez , Oliver Sang , kernel test robot , , , Benno Lossin , Nathan Chancellor Subject: Re: [linux-next:master 4752/13171] error[E0609]: no field `__bindgen_anon_1` on type `bindings::kernel_param` Message-ID: References: <202512020454.Tf36WHw5-lkp@intel.com> <3447801b-95f7-4368-a433-e79669b5d22e@kernel.org> <87fr9qwjt2.fsf@t14s.mail-host-address-is-not-set> <87cy4tw6nq.fsf@t14s.mail-host-address-is-not-set> Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <87cy4tw6nq.fsf@t14s.mail-host-address-is-not-set> X-ClientProxiedBy: SG2PR04CA0163.apcprd04.prod.outlook.com (2603:1096:4::25) To MN0PR11MB5963.namprd11.prod.outlook.com (2603:10b6:208:372::10) Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MN0PR11MB5963:EE_|CY8PR11MB6916:EE_ X-MS-Office365-Filtering-Correlation-Id: f46f8d87-e90d-466b-9a64-08de33ef7f37 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|376014|1800799024; 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Since clang-22 > >> > is not officially released yet, issues seen with it seem lower priority than > >> > those reproduced with stable, released versions. Does it make sense to act > >> > on these kind of "bleeding edge" reports, or should we wait until they're > >> > confirmed on a stable release? Does 0day test both? > >> > >> Some people in the kernel regularly test with unreleased compilers > >> (all GCC, Clang and Rust) in order to fix issues before those > >> compilers get actually released, e.g. ClangBuiltLinux for LLVM, I do > >> it for `rustc`, several people for GCC, etc. > >> > >> So I guess the idea is similar for kernel test robot? There is value > >> on doing that, and whether one should act depends -- if it is close to > >> the release of the compiler, then it makes sense to try to figure out > >> what is breaking so that the compiler has a chance to fix it. > >> Otherwise, if nobody tries, we would get quite broken compilers (for > >> the kernel use case at least). > > > > thanks, the bot tests multiple versions of compiler for both gcc and clang. > > For clang, low confidence ones will only be sent to llvm mailing list for > > check firstly, and for other issues, we will cc llvm mailing list who also > > monitor this closely and help check in case there's issue in latest compiler. > > > >> > >> It is also why I think having at least a basic kernel build on the > >> upstream CIs of the compilers is a good idea (it already showed value > >> in upstream Rust and perhaps we should talk about it again in LPC for > >> Clang). > >> > >> But, yeah, the reports can be confusing and reacting to them properly > >> does take time and effort (e.g. I need sometimes to bisect the > >> compiler etc.). > >> > >> Does LKP try the bleeding edge versions only if a stable compiler > >> built successfully? That could perhaps help. > > > > For bleeding edge, the bot regularly builds and use latest code now. > > > >> > >> Andreas also suggested yesterday in our meeting to have such bleeding > >> edge reports perhaps more clearly marked or similar. > > > > Probably we can mark rust issue as low confidence when it occurs on non > > released compiler, so it will not be directly sent to developer before it > > is further checked? > > Would it be possible to still send the report, but to inject a line to > the report stating it is marked as low confidence due to X and Y > (unreleased compiler etc.)? Got it, i can add a new line or update the reproduce line from reproduce (this is a W=1 build): To reproduce (this is a W=1 build on unreleased compiler): I can wait for a while to see any other comments regarding this. And of course, this can be refined at any time in the future to make the report clear. > > I think it is still valuable to get the reports, but it would be nice to > know we don't need to scramble all hands on deck immediately. Got it, sorry for this time's unclear info. > > I guess one could also just read the report more carefully to learn > that an unreleased compiler was used. But seeing this at a glance would > be great. > > > Best regards, > Andreas Hindborg > >