tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: f6b46ef27317b3441138b902689bd89e4f82c6f4 commit: ce50e82c1d69532fc05721ed7951480c8525e7fd [5116/5396] mm: device exclusive memory access config: alpha-randconfig-s032-20210526 (attached as .config) compiler: alpha-linux-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 # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout ce50e82c1d69532fc05721ed7951480c8525e7fd # 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=alpha If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) mm/memory.c:1024:17: sparse: sparse: context imbalance in 'copy_pte_range' - different lock contexts for basic block mm/memory.c:1721:16: sparse: sparse: context imbalance in '__get_locked_pte' - different lock contexts for basic block mm/memory.c:1770:9: sparse: sparse: context imbalance in 'insert_page' - different lock contexts for basic block mm/memory.c:2272:17: sparse: sparse: context imbalance in 'remap_pte_range' - different lock contexts for basic block mm/memory.c:2528:17: sparse: sparse: context imbalance in 'apply_to_pte_range' - unexpected unlock mm/memory.c:2816:17: sparse: sparse: context imbalance in 'wp_page_copy' - unexpected unlock mm/memory.c:3162:17: sparse: sparse: context imbalance in 'wp_pfn_shared' - unexpected unlock mm/memory.c:3225:19: sparse: sparse: context imbalance in 'do_wp_page' - different lock contexts for basic block mm/memory.c: note: in included file (through include/linux/mm.h, arch/alpha/include/asm/io.h, include/linux/io.h, include/linux/irq.h, ...): include/linux/pgtable.h:257:16: sparse: sparse: cast to non-scalar include/linux/pgtable.h:257:16: sparse: sparse: cast from non-scalar mm/memory.c:4823:5: sparse: sparse: context imbalance in 'follow_invalidate_pte' - different lock contexts for basic block mm/memory.c:4944:9: sparse: sparse: context imbalance in 'follow_pfn' - unexpected unlock vim +710 mm/memory.c 702 703 static void restore_exclusive_pte(struct vm_area_struct *vma, 704 struct page *page, unsigned long address, 705 pte_t *ptep) 706 { 707 pte_t pte; 708 swp_entry_t entry; 709 711 if (pte_swp_soft_dirty(*ptep)) 712 pte = pte_mksoft_dirty(pte); 713 714 entry = pte_to_swp_entry(*ptep); 715 if (pte_swp_uffd_wp(*ptep)) 716 pte = pte_mkuffd_wp(pte); 717 else if (is_writable_device_exclusive_entry(entry)) 718 pte = maybe_mkwrite(pte_mkdirty(pte), vma); 719 720 set_pte_at(vma->vm_mm, address, ptep, pte); 721 722 /* 723 * No need to take a page reference as one was already 724 * created when the swap entry was made. 725 */ 726 if (PageAnon(page)) 727 page_add_anon_rmap(page, vma, address, false); 728 else 729 /* 730 * Currently device exclusive access only supports anonymous 731 * memory so the entry shouldn't point to a filebacked page. 732 */ 733 WARN_ON_ONCE(!PageAnon(page)); 734 735 if (vma->vm_flags & VM_LOCKED) 736 mlock_vma_page(page); 737 738 /* 739 * No need to invalidate - it was non-present before. However 740 * secondary CPUs may have mappings that need invalidating. 741 */ 742 update_mmu_cache(vma, address, ptep); 743 } 744 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org