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All device driver we care about are using 64bits page table entry. In order to match this and to avoid useless define convert all HMM pfn to directly use uint64_t. It is a first step on the road to allow driver to directly use pfn value return by HMM (saving memory and CPU cycles use for conversion between the two). Link: http://lkml.kernel.org/r/20180323005527.758-9-jglisse@redhat.com Signed-off-by: Jérôme Glisse <jglisse@redhat.com> Reviewed-by: John Hubbard <jhubbard@nvidia.com> Cc: Evgeny Baskakov <ebaskakov@nvidia.com> Cc: Ralph Campbell <rcampbell@nvidia.com> Cc: Mark Hairgrove <mhairgrove@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>