arch/x86/kernel/traps.o: warning: objtool: handle_xfd_event()+0xdb: unreachable instruction

kernel test robot
2021-12-08T00:42:21Z

CC: linux-kernel@vger.kernel.org
TO: "Chang S. Bae" <chang.seok.bae@intel.com>
CC: Borislav Petkov <bp@suse.de>
CC: Thomas Gleixner <tglx@linutronix.de>

Hi Chang,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: cd8c917a56f20f48748dd43d9ae3caff51d5b987
commit: 783e87b404956f8958657aed8a6a72aa98d5b7e1 x86/fpu/xstate: Add XFD #NM handler
date: 6 weeks ago
config: x86_64-randconfig-r035-20211128 (https://download.01.org/0day-ci/archive/20211208/202112080834.XFYU8b5Q-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5c64d8ef8cc0c0ed3e0f2ae693d99e7f70f20a84)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=783e87b404956f8958657aed8a6a72aa98d5b7e1
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 783e87b404956f8958657aed8a6a72aa98d5b7e1
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/ block// crypto// drivers/ fs// kernel// mm// net/ sound/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> arch/x86/kernel/traps.o: warning: objtool: handle_xfd_event()+0xdb: unreachable instruction

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0-DAY CI Kernel Test Service, Intel Corporation