#define to_eisa_driver(drv) container_of(drv,struct eisa_driver, driver)
+/* These external functions are only available when EISA support is enabled. */
+#ifdef CONFIG_EISA
+
extern struct bus_type eisa_bus_type;
int eisa_driver_register (struct eisa_driver *edrv);
void eisa_driver_unregister (struct eisa_driver *edrv);
+#else /* !CONFIG_EISA */
+
+static inline int eisa_driver_register (struct eisa_driver *edrv) { return 0; }
+static inline void eisa_driver_unregister (struct eisa_driver *edrv) { }
+
+#endif /* !CONFIG_EISA */
+
/* Mimics pci.h... */
static inline void *eisa_get_drvdata (struct eisa_device *edev)
{