tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 37187df45af7d28d27b5c130c23f407ca9dbefa2 commit: 0887a7ebc97770c7870abf3075a2e8cd502a7f52 ubsan: add trap instrumentation option 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=0887a7ebc97770c7870abf3075a2e8cd502a7f52 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 0887a7ebc97770c7870abf3075a2e8cd502a7f52 # 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 <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> fs/ext4/inode.o: warning: objtool: mpage_release_unused_pages()+0x22c: unreachable instruction -- >> block/blk-flush.o: warning: objtool: blk_flush_complete_seq()+0x6f: unreachable instruction -- >> drivers/virtio/virtio_ring.o: warning: objtool: virtqueue_add_split()+0x3a: unreachable instruction -- >> drivers/ide/ide-probe.o: warning: objtool: ide_host_remove()+0x5f: unreachable instruction -- >> net/core/flow_dissector.o: warning: objtool: skb_flow_dissector_init()+0x80: unreachable instruction -- >> drivers/usb/host/isp116x-hcd.o: warning: objtool: postproc_atl_queue()+0x6c: unreachable instruction --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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