tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: f8456690ba8eb18ea4714e68554e242a04f65cff commit: 6863f5643dd717376c2fdc85a47a00f9d738a834 kbuild: allow Clang to find unused static inline functions for W=1 build date: 10 months ago config: x86_64-randconfig-a006-20200716 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project ed6b578040a85977026c93bf4188f996148f3218) 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 6863f5643dd717376c2fdc85a47a00f9d738a834 # 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 >>): static inline int get_pt_type(int type) ^ static inline void ppgtt_set_guest_root_entry(struct intel_vgpu_mm *mm, ^ 2 errors generated. vim +/get_pt_type +263 drivers/gpu/drm/i915/gvt/gtt.c 2707e44466881d Zhi Wang 2016-03-28 262 054f4eba2a2985 Zhi Wang 2017-10-10 @263 static inline int get_pt_type(int type) 054f4eba2a2985 Zhi Wang 2017-10-10 264 { 054f4eba2a2985 Zhi Wang 2017-10-10 265 return gtt_type_table[type].pt_type; 054f4eba2a2985 Zhi Wang 2017-10-10 266 } 054f4eba2a2985 Zhi Wang 2017-10-10 267 :::::: The code at line 263 was first introduced by commit :::::: 054f4eba2a2985b1db43353b7b5ce90e96cf9bb9 drm/i915/gvt: Introduce page table type of current level in GTT type enumerations :::::: TO: Zhi Wang <zhi.a.wang(a)intel.com&gt; :::::: CC: Zhenyu Wang <zhenyuw(a)linux.intel.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org