[RFC PATCH 1/7] mm/hugetlb/migration: Use set_huge_pte_at instead of set_pte_at

[Aneesh Kumar K.V]

The patch series is not yet send to linux-mm. Once I get feedback on the 
approach used, I will resend this to linux-mm.

Also if there is sufficient interest we could also get nohash hugetlb 
migration to work. But I avoided doing that in this series, because of 
my inability to test the changes.

-aneesh