HMM FOR 5.1 COVER LETTER

Signed-off-by: Jérôme Glisse <jglisse@redhat.com>

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+This patchset improves the HMM driver API and add support for hugetlbfs
+and DAX mirroring. The improvement motivation was to make the ODP to HMM
+conversion easier [1]. Because we have nouveau bits schedule for 5.1 and
+to avoid any multi-tree synchronization this patchset adds few lines of
+inline function that wrap the existing HMM driver API to the improved
+API. The nouveau driver was tested before and after this patchset and it
+builds and works on both case so there is no merging issue [2].
+
+If this get merge in 5.1 the plans is to merge the HMM to ODP in 5.2 or
+5.3 if testing shows any issues (so far no issues has been found with
+limited testing but Mellanox will running heavier testing for longer
+time).
+
+To avoid spamming mm i would like to not cc mm on ODP or nouveau patches,
+however if people prefer to see those on mm mailing list then i can keep
+it cced.
+
+[1] https://cgit.freedesktop.org/~glisse/linux/log/?h=odp-hmm
+[2] https://cgit.freedesktop.org/~glisse/linux/log/?h=hmm-for-5.1
+
+Cc: Andrew Morton <akpm@linux-foundation.org>
+Cc: Felix Kuehling <Felix.Kuehling@amd.com>
+Cc: Christian König <christian.koenig@amd.com>
+Cc: Ralph Campbell <rcampbell@nvidia.com>
+Cc: John Hubbard <jhubbard@nvidia.com>
+Cc: Jason Gunthorpe <jgg@mellanox.com>
+Cc: Dan Williams <dan.j.williams@intel.com>