ifr = ifc.ifc_req;
        ifr32 = compat_ptr(ifc32.ifcbuf);
        for (i = 0, j = 0; i < ifc32.ifc_len && j < ifc.ifc_len;
             i += sizeof (struct ifreq32), j += sizeof (struct ifreq)) {
                if (copy_in_user(ifr32, ifr, sizeof (struct ifreq32)))
                        return -EFAULT;
                ifr32++;
                ifr++;
        }