On Wed, 6 Feb 2019, Tony Krowiak wrote: > diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c > +void ap_bus_cfg_chg(void) > +{ > + AP_DBF(DBF_INFO, "%s config change, forcing bus rescan\n", __func__); > + > + ap_bus_force_rescan(); > +} > +EXPORT_SYMBOL(ap_bus_cfg_chg); There is still no need for the EXPORT_SYMBOL. You only call that function from chsc.c which is always build in.