tree: https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git kvm-unmapped-poison head: 51d4d402256b9c1b8e38be95bfa2bb28dc8189ad commit: 51d4d402256b9c1b8e38be95bfa2bb28dc8189ad [7/7] KVM: unmap guest memory with poison config: s390-randconfig-r011-20210312 (attached as .config) compiler: s390-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://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git/commit/?id=... git remote add kas https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git git fetch --no-tags kas kvm-unmapped-poison git checkout 51d4d402256b9c1b8e38be95bfa2bb28dc8189ad # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 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 errors (new ones prefixed by >>): arch/s390/kvm/../../../virt/kvm/kvm_main.c: In function 'kvm_share_memory': 2809 | if (!TestClearPageHWPoison(page)) | ^~~~~~~~~~~~~~~~~~~~~ | ClearPageHWPoison cc1: some warnings being treated as errors vim +2809 arch/s390/kvm/../../../virt/kvm/kvm_main.c 2780 2781 int kvm_share_memory(struct kvm *kvm, unsigned long gfn, unsigned long npages) 2782 { 2783 unsigned long end = gfn + npages; 2784 2785 if (!npages) 2786 return 0; 2787 2788 /* 2789 * Out of slots. 2790 * Still worth to proceed: the new range may merge with an existing 2791 * one. 2792 */ 2793 WARN_ON_ONCE(nr_shared_ranges == ARRAY_SIZE(shared_ranges)); 2794 2795 if (mmap_write_lock_killable(kvm->mm)) 2796 return -KVM_EINTR; 2797 nr_shared_ranges = add_range_with_merge(shared_ranges, 2798 ARRAY_SIZE(shared_ranges), 2799 nr_shared_ranges, gfn, end); 2800 nr_shared_ranges = clean_sort_range(shared_ranges, 2801 ARRAY_SIZE(shared_ranges)); 2802 mmap_write_unlock(kvm->mm); 2803 2804 for (; gfn < end; gfn++) { 2805 struct page *page = gfn_to_page(kvm, gfn); 2806 2807 if (page == KVM_ERR_PTR_BAD_PAGE) 2808 continue; 2810 continue; 2811 lock_page(page); 2812 remove_migration_ptes(page, page, false); 2813 unlock_page(page); 2814 put_page(page); 2815 } 2816 2817 return 0; 2818 } 2819 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org