IRQ_NATIVE_KFUNC
const char *flag_kfunc = st->irq.kfunc_class == IRQ_NATIVE_KFUNC ? "native" : "lock";
const char *used_kfunc = kfunc_class == IRQ_NATIVE_KFUNC ? "native" : "lock";
int err, kfunc_class = IRQ_NATIVE_KFUNC;