[kbuild-all] [pci:review/vga 1/9] drivers/pci/vgaarb.o: warning: objtool: vga_arb_read()+0x38a: unreachable instruction

TO: Bjorn Helgaas <helgaas(a)kernel.org&gt; tree: https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git review/vga head: d3ff98e99536cd76e77696889600ee06fe5253b2 commit: e7d0ca67cfb1c61feb5fed7632cedb69e7ccdd79 [1/9] PCI/VGA: Move vgaarb to drivers/pci config: x86_64-randconfig-r004-20210723 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9625ca5b602616b2f5584e8a49ba93c52c141e40) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git/commit/?i... git remote add pci https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git git fetch --no-tags pci review/vga git checkout e7d0ca67cfb1c61feb5fed7632cedb69e7ccdd79 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=x86_64 SHELL=/bin/bash block// drivers/ 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