tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 3e4fb4346c781068610d03c12b16c0cfb0fd24a3 commit: bd841d6154f5f41f8a32d3c1b0bc229e326e640a objtool: Fix CONFIG_UBSAN_TRAP unreachable warnings date: 6 months ago config: x86_64-randconfig-m001-20201015 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bd841d6154f5f41f8a32d3c1b0bc229e326e640a git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout bd841d6154f5f41f8a32d3c1b0bc229e326e640a # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> fs/ntfs/attrib.o: warning: objtool: ntfs_attr_extend_allocation()+0x18f: unreachable instruction -- >> fs/ntfs/super.o: warning: objtool: ntfs_fill_super()+0x2ce: unreachable instruction -- >> drivers/ide/ide-tape.o: warning: objtool: idetape_queue_rw_tail()+0x4a: unreachable instruction -- >> arch/x86/platform/pvh/enlighten.o: warning: objtool: xen_prepare_pvh()+0x108: unreachable instruction -- >> mm/ksm.o: warning: objtool: ksm_scan_thread()+0x1f3: unreachable instruction -- >> mm/vmscan.o: warning: objtool: shrink_page_list()+0x1cd: unreachable instruction -- >> mm/compaction.o: warning: objtool: compact_zone()+0x27f: unreachable instruction -- >> mm/vmalloc.o: warning: objtool: vm_map_ram()+0x5f: unreachable instruction -- >> fs/mpage.o: warning: objtool: do_mpage_readpage()+0x656: unreachable instruction -- >> fs/buffer.o: warning: objtool: create_page_buffers()+0x3d: unreachable instruction -- >> fs/ext4/mballoc.o: warning: objtool: ext4_mb_normalize_request.constprop.0()+0xcf: unreachable instruction .. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org