On Tue, Jul 23, 2024 at 10:28:15AM +0200, David Hildenbrand wrote: > On 23.07.24 00:56, kernel test robot wrote: > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > > head: 933069701c1b507825b514317d4edd5d3fd9d417 > > commit: 631426ba1d45a8672b177ee85ad4cabe760dd131 mm/madvise: make MADV_POPULATE_(READ|WRITE) handle VM_FAULT_RETRY properly > > date: 3 months ago > > config: loongarch-randconfig-001-20240722 (https://download.01.org/0day-ci/archive/20240723/202407230630.3vGhnlFB-lkp@xxxxxxxxx/config) > > compiler: loongarch64-linux-gcc (GCC) 14.1.0 > > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240723/202407230630.3vGhnlFB-lkp@xxxxxxxxx/reproduce) > > > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > > the same patch/commit), kindly add following tags > > | Reported-by: kernel test robot <lkp@xxxxxxxxx> > > | Closes: https://lore.kernel.org/oe-kbuild-all/202407230630.3vGhnlFB-lkp@xxxxxxxxx/ > > > > All warnings (new ones prefixed by >>): > > > > mm/gup.o: warning: objtool: get_user_pages_remote+0x160: unreachable instruction > > mm/gup.o: warning: objtool: get_user_pages+0x12c: unreachable instruction > > mm/gup.o: warning: objtool: get_user_pages_unlocked+0x138: unreachable instruction > > mm/gup.o: warning: objtool: __gup_longterm_locked+0x3d8: unreachable instruction > > > > mm/gup.o: warning: objtool: faultin_page_range+0x100: unreachable instruction > > > > > > objdump-func vmlinux.o faultin_page_range: > > > > I'm afraid I don't know how serious I should take this report :/ Sorry, kindly ignore this report which could be related to tool chain upgrade to loongarch64-linux-gcc (GCC) 14.1.0. We will further check whether the issue can be reproduced on gcc-13. > > The commit is 3 month old and was found on some toolchain with some > randconfig on some architecture, in code that is not particularly > architecture specific. > > I wish I could even understand from the report what is happening here > ("unreachable instruction" -- isn't that the compilers fault if it generates > that such that objtool would complain? Why is that a C code issue?) > > Please, someone shout if I should take a closer look at this. > > -- > Cheers, > > David / dhildenb > >
