#ifdef __KERNEL__
-extern uint32_t rxrpc_epoch;
+extern __be32 rxrpc_epoch;
+#ifdef CONFIG_SYSCTL
extern int rxrpc_ktrace;
extern int rxrpc_kdebug;
extern int rxrpc_kproto;
extern int rxrpc_knet;
+#else
+#define rxrpc_ktrace 0
+#define rxrpc_kdebug 0
+#define rxrpc_kproto 0
+#define rxrpc_knet 0
+#endif
extern int rxrpc_sysctl_init(void);
extern void rxrpc_sysctl_cleanup(void);