Hi Kris, FYI, the error/warning still remains. tree: https://github.com/intel/linux-intel-lts.git 4.14/yocto/base head: 1495f925e1703950fc61813cc0377cbcdf648385 commit: 4061602f6467fba015e9923e58102fc2d022b39b [13391/21617] x86/cpu: fix FAM6_ATOM naming config: xtensa-randconfig-c004-20201231 (attached as .config) compiler: xtensa-linux-gcc (GCC) 7.5.0 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://github.com/intel/linux-intel-lts/commit/4061602f6467fba015e9923e5... git remote add intel-linux-intel-lts https://github.com/intel/linux-intel-lts.git git fetch --no-tags intel-linux-intel-lts 4.14/yocto/base git checkout 4061602f6467fba015e9923e58102fc2d022b39b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 make.cross ARCH=xtensa 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 >>): In file included from include/sound/pcm.h:27:0, from sound/core/pcm_iec958.c:11: include/sound/memalloc.h: In function 'snd_sgbuf_aligned_pages': return (size + PAGE_SIZE - 1) >> PAGE_SHIFT; ^~~~~~~~~ TASK_SIZE include/sound/memalloc.h:77:17: note: each undeclared identifier is reported only once for each function it appears in return (size + PAGE_SIZE - 1) >> PAGE_SHIFT; ^~~~~~~~~~ PAGE_SIZE vim +77 include/sound/memalloc.h 71 72 /* 73 * return the pages matching with the given byte size 74 */ 75 static inline unsigned int snd_sgbuf_aligned_pages(size_t size) 76 { 78 } 79 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org