[IPV6] Fix unresolved symbol timer_bug_msg.

Closed: Bug#3717 (by John Goerzen <goerzen@complete.org>)
Signed-off-by: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>

include/net/tcp.h

@@ -965,7 +965,9 @@ extern void tcp_reset_keepalive_timer(struct sock *, unsigned long);
 extern unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu);
 extern unsigned int tcp_current_mss(struct sock *sk, int large);
 
-extern const char timer_bug_msg[];
+#ifdef TCP_DEBUG
+extern const char tcp_timer_bug_msg[];
+#endif
 
 /* tcp_diag.c */
 extern void tcp_get_info(struct sock *, struct tcp_info *);
@@ -998,7 +1000,9 @@ static inline void tcp_clear_xmit_timer(struct sock *sk, int what)
 #endif
 		break;
 	default:
-		printk(timer_bug_msg);
+#ifdef TCP_DEBUG
+		printk(tcp_timer_bug_msg);
+#endif
 		return;
 	};
 
@@ -1033,7 +1037,9 @@ static inline void tcp_reset_xmit_timer(struct sock *sk, int what, unsigned long
 		break;
 
 	default:
-		printk(timer_bug_msg);
+#ifdef TCP_DEBUG
+		printk(tcp_timer_bug_msg);
+#endif
 	};
 }
 

net/ipv4/tcp_timer.c

@@ -36,7 +36,9 @@ static void tcp_write_timer(unsigned long);
 static void tcp_delack_timer(unsigned long);
 static void tcp_keepalive_timer (unsigned long data);
 
-const char timer_bug_msg[] = KERN_DEBUG "tcpbug: unknown timer value\n";
+#ifdef TCP_DEBUG
+const char tcp_timer_bug_msg[] = KERN_DEBUG "tcpbug: unknown timer value\n";
+#endif
 
 /*
  * Using different timers for retransmit, delayed acks and probes
@@ -651,3 +653,6 @@ EXPORT_SYMBOL(tcp_clear_xmit_timers);
 EXPORT_SYMBOL(tcp_delete_keepalive_timer);
 EXPORT_SYMBOL(tcp_init_xmit_timers);
 EXPORT_SYMBOL(tcp_reset_keepalive_timer);
+#ifdef TCP_DEBUG
+EXPORT_SYMBOL(tcp_timer_bug_msg);
+#endif