[kbuild-all] fs/btrfs/compression.o: warning: objtool: alloc_compressed_bio()+0x3af: unreachable instruction

CC: linux-kernel(a)vger.kernel.org TO: Qu Wenruo <wqu(a)suse.com&gt; CC: David Sterba <dsterba(a)suse.com&gt; tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 5472f14a37421d1bca3dddf33cabd3bd6dbefbbc commit: f472c28f2e883c3d2781ea6aaaca204e34e93b63 btrfs: determine stripe boundary at bio allocation time in btrfs_submit_compressed_read date: 7 weeks ago config: x86_64-randconfig-r035-20211128 (https://download.01.org/0day-ci/archive/20211214/202112141143.euTMArlo-lk...) 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... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout f472c28f2e883c3d2781ea6aaaca204e34e93b63 # 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 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org