userfaultfd: hugetlbfs: add userfaultfd hugetlb hook

When processing a hugetlb fault for no page present, check the vma to
determine if faults are to be handled via userfaultfd.  If so, drop the
hugetlb_fault_mutex and call handle_userfault().

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Mike Kravetz <[email protected]>
Signed-off-by: Andrea Arcangeli <[email protected]>
Acked-by: Hillf Danton <[email protected]>
Cc: "Dr. David Alan Gilbert" <[email protected]>
Cc: Michael Rapoport <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Pavel Emelyanov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions