pdc_add_valid
int pdc_add_valid(unsigned long address);
EXPORT_SYMBOL(pdc_add_valid);
if(pdc_add_valid(lasi_base+0x4004) == PDC_OK)
if (boot_cpu_data.cpu_type > pcxt && !pdc_add_valid(port+4)) {
pdc_add_valid(address)) {