[PATCH v6 24/26] mm: Remove devmap related functions and page table bits

[Dan Williams]

Alistair Popple wrote:
> Now that DAX and all other reference counts to ZONE_DEVICE pages are
> managed normally there is no need for the special devmap PTE/PMD/PUD
> page table bits. So drop all references to these, freeing up a
> software defined page table bit on architectures supporting it.
> 
> Signed-off-by: Alistair Popple <apopple at nvidia.com>
> Acked-by: Will Deacon <will at kernel.org> # arm64

Hooray! Looks good to me modulo breaking up the previous patch.

Reviewed-by: Dan Williams <dan.j.williams at intel.com>