#define zorro_resource_start(z) ((z)->resource.start)
#define zorro_resource_end(z) ((z)->resource.end)
-#define zorro_resource_len(z) ((z)->resource.end-(z)->resource.start+1)
+#define zorro_resource_len(z) (resource_size(&(z)->resource))
#define zorro_resource_flags(z) ((z)->resource.flags)
#define zorro_request_device(z, name) \