tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git pending-5.4 head: 1f9e7a61c29e139420352f203f2aa2bad3bac189 commit: 25b543df1007266478f6e995ad92f1a5c51d8525 [226/320] s390/gmap: validate VMA in __gmap_zap() config: s390-buildonly-randconfig-r002-20211114 (attached as .config) compiler: s390-linux-gcc (GCC) 11.2.0 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://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git/c... git remote add sashal-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git git fetch --no-tags sashal-stable pending-5.4 git checkout 25b543df1007266478f6e995ad92f1a5c51d8525 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): arch/s390/mm/gmap.c: In function '__gmap_zap': arch/s390/mm/gmap.c:687:23: error: implicit declaration of function 'vma_lookup'; did you mean 'key_lookup'? [-Werror=implicit-function-declaration] 687 | vma = vma_lookup(gmap->mm, vmaddr); | ^~~~~~~~~~ | key_lookup 687 | vma = vma_lookup(gmap->mm, vmaddr); | ^ cc1: some warnings being treated as errors vim +687 arch/s390/mm/gmap.c 670 671 /* 672 * this function is assumed to be called with mmap_sem held 673 */ 674 void __gmap_zap(struct gmap *gmap, unsigned long gaddr) 675 { 676 struct vm_area_struct *vma; 677 unsigned long vmaddr; 678 spinlock_t *ptl; 679 pte_t *ptep; 680 681 /* Find the vm address for the guest address */ 682 vmaddr = (unsigned long) radix_tree_lookup(&gmap->guest_to_host, 683 gaddr >> PMD_SHIFT); 684 if (vmaddr) { 685 vmaddr |= gaddr & ~PMD_MASK; 686 688 if (!vma || is_vm_hugetlb_page(vma)) 689 return; 690 691 /* Get pointer to the page table entry */ 692 ptep = get_locked_pte(gmap->mm, vmaddr, &ptl); 693 if (likely(ptep)) 694 ptep_zap_unused(gmap->mm, vmaddr, ptep, 0); 695 pte_unmap_unlock(ptep, ptl); 696 } 697 } 698 EXPORT_SYMBOL_GPL(__gmap_zap); 699 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org