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CXL spec defines the volatile DPA range to be 0 to Volatile memory size. It further defines the persistent DPA range to follow directly after the end of the Volatile DPA through the persistent memory size. Essentially Volatile DPA range = [0, Volatile size) Persistent DPA range = [Volatile size, Volatile size + Persistent size) Adjust the pmem_range start to reflect this and remote the TODO. Signed-off-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Link: https://lore.kernel.org/r/20210617221620.1904031-4-ira.weiny@intel.com Signed-off-by: Dan Williams <dan.j.williams@intel.com>