This is the trivial call chain below amd_iommu_domain_flush_pages(). Cases that are doing a full invalidate will pass a last of U64_MAX. This avoids converting between size and last, and type confusion with size_t, unsigned long and u64 all being used in different places along the driver's invalidation path. Consistently use u64 in the internals. Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Tested-by: Dheeraj Kumar Srivastava <dheerajkumar.srivastava@amd.com> Reviewed-by: Vasant Hegde <vasant.hegde@amd.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>