hr_hw_page_align
return hr_hw_page_align(count << buf_shift);
return hr_hw_page_align(count << buf_shift) >> buf_shift;
left_len_in_pg = hr_hw_page_align((uintptr_t)dseg) - (uintptr_t)dseg;
buf_size = hr_hw_page_align(attr->region[i].size + pgoff);