Hi Axel, Thank you for the patch! Yet something to improve: [auto build test ERROR on arm64/for-next/core] [also build test ERROR on powerpc/next s390/features tip/perf/core linus/master v5.11-rc3 next-20210115] [cannot apply to hp-parisc/for-next hnaz-linux-mm/master ia64/next sparc-next/master sparc/master] [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/Axel-Rasmussen/userfaultfd-add-m... base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core config: mips-cavium_octeon_defconfig (attached as .config) compiler: mips64-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/4af095177515048cbeff41653579e2243... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Axel-Rasmussen/userfaultfd-add-minor-fault-handling/20210116-030900 git checkout 4af095177515048cbeff41653579e2243fef2295 # 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 >>): 24 | pte_t *huge_pte_alloc(struct mm_struct *mm, structt vm_area_struct *vma, | ^~~~~~~ | struct vim +24 arch/mips/mm/hugetlbpage.c 23 25 unsigned long addr, unsigned long sz) 26 { 27 pgd_t *pgd; 28 p4d_t *p4d; 29 pud_t *pud; 30 pte_t *pte = NULL; 31 32 pgd = pgd_offset(mm, addr); 33 p4d = p4d_alloc(mm, pgd, addr); 34 pud = pud_alloc(mm, p4d, addr); 35 if (pud) 36 pte = (pte_t *)pmd_alloc(mm, pud, addr); 37 38 return pte; 39 } 40 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org