pginfo.u.phy.num_phys_buf = num_phys_buf;
                pginfo.u.phy.phys_buf_array = phys_buf_array;
                pginfo.next_hwpage =
-                       ((u64)iova_start & ~(hw_pgsize - 1)) / hw_pgsize;
+                       ((u64)iova_start & ~PAGE_MASK) / hw_pgsize;
 
                ret = ehca_reg_mr(shca, e_mr, iova_start, size, mr_access_flags,
                                  e_pd, &pginfo, &e_mr->ib.ib_mr.lkey,
                pginfo.u.phy.num_phys_buf = num_phys_buf;
                pginfo.u.phy.phys_buf_array = phys_buf_array;
                pginfo.next_hwpage =
-                       ((u64)iova_start & ~(hw_pgsize - 1)) / hw_pgsize;
+                       ((u64)iova_start & ~PAGE_MASK) / hw_pgsize;
        }
        if (mr_rereg_mask & IB_MR_REREG_ACCESS)
                new_acl = mr_access_flags;