[PATCH v1 0/3] mm: follow_pte() improvements and acrn follow_pte() fixes

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Patch #1 fixes a bunch of issues I spotted in the acrn driver. It compiles,
that's all I know. I'll appreciate some review and testing from acrn

Patch #2+#3 improve follow_pte(), passing a VMA instead of the MM, adding
more sanity checks, and improving the documentation. Gave it a quick
test on x86-64 using VM_PAT that ends up using follow_pte().

Not CCing all s390x and x86 maintainers (but lists), to reduce noise.

As this depends on other stuff in mm-unstable, this should likely go via
the MM tree.

Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Yonghua Huang <yonghua.huang@xxxxxxxxx>
Cc: Fei Li <fei1.li@xxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Gerald Schaefer <gerald.schaefer@xxxxxxxxxxxxx>
Cc: Heiko Carstens <hca@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Alex Williamson <alex.williamson@xxxxxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>

David Hildenbrand (3):
  drivers/virt/acrn: fix PFNMAP PTE checks in acrn_vm_ram_map()
  mm: pass VMA instead of MM to follow_pte()
  mm: follow_pte() improvements

 arch/s390/pci/pci_mmio.c        |  4 +--
 arch/x86/mm/pat/memtype.c       |  5 +--
 drivers/vfio/vfio_iommu_type1.c |  4 +--
 drivers/virt/acrn/mm.c          | 62 ++++++++++++++++++++++++---------
 include/linux/mm.h              |  2 +-
 mm/memory.c                     | 35 ++++++++++++-------
 virt/kvm/kvm_main.c             |  4 +--
 7 files changed, 77 insertions(+), 39 deletions(-)


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