[PATCH 0/6] userfaultfd updates for v4.13-rc3

[Andrea Arcangeli <aarcange@redhat.com>]

Hello,

these are some uffd updates I have pending that looks ready for
merging. vhost-user KVM developement run into a crash so patch 1/6 is
urgent (and simple), the rest is not urgent.

The testcase has been updated to exercise it.

This should apply clean to -mm, and I reviewed in detail all other
userfaultfd patches that are in -mm and they're all great, including
the shmem zeropage addition.

Alexey Perevalov (1):
  userfaultfd: provide pid in userfault msg

Andrea Arcangeli (5):
  userfaultfd: hugetlbfs: remove superfluous page unlock in VM_SHARED
    case
  userfaultfd: selftest: exercise UFFDIO_COPY/ZEROPAGE -EEXIST
  userfaultfd: selftest: explicit failure if the SIGBUS test failed
  userfaultfd: call userfaultfd_unmap_prep only if __split_vma succeeds
  userfaultfd: provide pid in userfault msg - add feat union

 fs/userfaultfd.c                         |   8 +-
 include/uapi/linux/userfaultfd.h         |  12 ++-
 mm/hugetlb.c                             |   2 +-
 mm/mmap.c                                |  22 +++--
 tools/testing/selftests/vm/userfaultfd.c | 149 +++++++++++++++++++++++++++++--
 5 files changed, 172 insertions(+), 21 deletions(-)

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