tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git mm/apply-to-page-range head: fc797cd41cc82abe5d1c11ec595e1b8762605370 commit: 2f7debefe556903753abd5ccddb7c628c1dcb6f3 [7/8] mm: Unexport apply_to_page_range() config: x86_64-rhel-8.3-kselftests (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?... git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git git fetch --no-tags peterz-queue mm/apply-to-page-range git checkout 2f7debefe556903753abd5ccddb7c628c1dcb6f3 # save the attached .config to linux build tree make W=1 W=1 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 >>, old ones prefixed by <<): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org