ib_umem_dma_offset
create_req->offset_in_page = ib_umem_dma_offset(umem, page_sz);
while ((ib_umem_dma_offset(umem, page_size) != 0 ||
ib_umem_dma_offset(obj->umem, page_size));
page_offset = ib_umem_dma_offset(umem, page_size);
page_offset = ib_umem_dma_offset(umem, page_size);