Hi Peter, FYI, the error/warning still remains. tree: https://android.googlesource.com/kernel/common android12-5.10 head: c8df669b7cf85238443a0df3e136a8dd0364e52d commit: 59caf93f36aed4b7c5960672376b966e3f5b2bf1 [7509/9468] BACKPORT: FROMGIT: hugetlb: pass vma into huge_pte_alloc() and huge_pmd_share() config: arm-randconfig-s032-20210521 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty git remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android12-5.10 git checkout 59caf93f36aed4b7c5960672376b966e3f5b2bf1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=arm 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 >>): mm/hugetlb.c:5458:8: error: conflicting types for 'huge_pmd_share' 5458 | pte_t *huge_pmd_share(struct mm_struct *mm, struct vm_area_struct vma, | ^~~~~~~~~~~~~~ In file included from mm/hugetlb.c:39: include/linux/hugetlb.h:155:8: note: previous declaration of 'huge_pmd_share' was here 155 | pte_t *huge_pmd_share(struct mm_struct *mm, struct vm_area_struct *vma, | ^~~~~~~~~~~~~~ mm/hugetlb.c: In function 'huge_pte_alloc': 5497 | pte = huge_pmd_share(mm, vma, addr, pud); | ^~~ | | | struct vm_area_struct * mm/hugetlb.c:5458:67: note: expected 'struct vm_area_struct' but argument is of type 'struct vm_area_struct *' 5458 | pte_t *huge_pmd_share(struct mm_struct *mm, struct vm_area_struct vma, | ~~~~~~~~~~~~~~~~~~~~~~^~~ vim +/huge_pmd_share +5497 mm/hugetlb.c 5476 5477 #ifdef CONFIG_ARCH_WANT_GENERAL_HUGETLB 5478 pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma, 5479 unsigned long addr, unsigned long sz) 5480 { 5481 pgd_t *pgd; 5482 p4d_t *p4d; 5483 pud_t *pud; 5484 pte_t *pte = NULL; 5485 5486 pgd = pgd_offset(mm, addr); 5487 p4d = p4d_alloc(mm, pgd, addr); 5488 if (!p4d) 5489 return NULL; 5490 pud = pud_alloc(mm, p4d, addr); 5491 if (pud) { 5492 if (sz == PUD_SIZE) { 5493 pte = (pte_t *)pud; 5494 } else { 5495 BUG_ON(sz != PMD_SIZE); 5496 if (want_pmd_share() && pud_none(*pud)) 5498 else 5499 pte = (pte_t *)pmd_alloc(mm, pud, addr); 5500 } 5501 } 5502 BUG_ON(pte && pte_present(*pte) && !pte_huge(*pte)); 5503 5504 return pte; 5505 } 5506 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org