extern void dmi_scan_machine(void);
extern int dmi_get_year(int field);
extern int dmi_name_in_vendors(const char *str);
+extern int dmi_available;
#else
const struct dmi_device *from) { return NULL; }
static inline int dmi_get_year(int year) { return 0; }
static inline int dmi_name_in_vendors(const char *s) { return 0; }
+#define dmi_available 0
#endif