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>
sparse warnings: (new ones prefixed by >>)
> mm/memory.c:710:25: sparse: sparse: cast to non-scalar
> mm/memory.c:710:25: sparse: sparse: cast from non-scalar
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
710 pte = pte_mkold(mk_pte(page, READ_ONCE(vma->vm_page_prot)));
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