Hi Peter, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on asm-generic/master] [cannot apply to arm64/for-next/core linus/master hnaz-linux-mm/master v5.11-rc3 next-20210115] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Peter-Xu/userfaultfd-wp-Support-... base: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git master config: mips-randconfig-p001-20210115 (attached as .config) compiler: mips-linux-gcc (GCC) 9.3.0 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/0day-ci/linux/commit/b77e0f36ccdb01804bf08cc2bf67403e1... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Peter-Xu/userfaultfd-wp-Support-shmem-and-hugetlbfs/20210116-011305 git checkout b77e0f36ccdb01804bf08cc2bf67403e13f75ae6 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 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 fs/userfaultfd.c:30: fs/userfaultfd.c: In function 'hugetlb_unshare_all_pmds': 971 | #define flush_hugetlb_tlb_range(vma, addr, end) flush_tlb_range(vma, addr, end) | ^~~~~~~~~~~~~~~ fs/userfaultfd.c:1232:2: note: in expansion of macro 'flush_hugetlb_tlb_range' 1232 | flush_hugetlb_tlb_range(vma, vma->vm_start, vma->vm_end); | ^~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +971 include/linux/hugetlb.h af7cc4ba61a97d Peter Xu 2021-01-15 965 e9650bd70dc030 Peter Xu 2021-01-15 966 #ifndef __HAVE_ARCH_FLUSH_HUGETLB_TLB_RANGE e9650bd70dc030 Peter Xu 2021-01-15 967 /* e9650bd70dc030 Peter Xu 2021-01-15 968 * ARCHes with special requirements for evicting HUGETLB backing TLB entries can e9650bd70dc030 Peter Xu 2021-01-15 969 * implement this. e9650bd70dc030 Peter Xu 2021-01-15 970 */ e9650bd70dc030 Peter Xu 2021-01-15 @971 #define flush_hugetlb_tlb_range(vma, addr, end) flush_tlb_range(vma, addr, end) e9650bd70dc030 Peter Xu 2021-01-15 972 #endif e9650bd70dc030 Peter Xu 2021-01-15 973 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org