[kbuild-all] [hch-misc:alloc_vm_area 4/7] ld.lld: error: undefined symbol: vmap_pfn

tree: git://git.infradead.org/users/hch/misc.git alloc_vm_area head: d574728eedb41cee38600f7f2199852e9018a50a commit: 22728ce0908b9495312398ae96bf901e6b31f664 [4/7] drm/i915: use vmap in i915_gem_object_map config: x86_64-randconfig-a003-20200917 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 0ff28fa6a75617d61b1aeea77463d6a1684c3c89) 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 git checkout 22728ce0908b9495312398ae96bf901e6b31f664 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org