[IPV4]: possible cleanups

This patch contains the following possible cleanups:
- make needlessly global code static
- #if 0 the following unused global function:
  - xfrm4_state.c: xfrm4_state_fini
- remove the following unneeded EXPORT_SYMBOL's:
  - ip_output.c: ip_finish_output
  - ip_output.c: sysctl_ip_default_ttl
  - fib_frontend.c: ip_dev_find
  - inetpeer.c: inet_peer_idlock
  - ip_options.c: ip_options_compile
  - ip_options.c: ip_options_undo
  - net/core/request_sock.c: sysctl_max_syn_backlog
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/ip.h

@@ -140,8 +140,6 @@ struct ip_reply_arg {
 void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *arg,
 		   unsigned int len); 
 
-extern int ip_finish_output(struct sk_buff *skb);
-
 struct ipv4_config
 {
 	int	log_martians;

include/net/route.h

@@ -105,10 +105,6 @@ struct rt_cache_stat
         unsigned int out_hlist_search;
 };
 
-extern struct rt_cache_stat *rt_cache_stat;
-#define RT_CACHE_STAT_INC(field)					  \
-		(per_cpu_ptr(rt_cache_stat, raw_smp_processor_id())->field++)
-
 extern struct ip_rt_acct *ip_rt_acct;
 
 struct in_device;

include/net/xfrm.h

@@ -818,7 +818,6 @@ extern void xfrm6_init(void);
 extern void xfrm6_fini(void);
 extern void xfrm_state_init(void);
 extern void xfrm4_state_init(void);
-extern void xfrm4_state_fini(void);
 extern void xfrm6_state_init(void);
 extern void xfrm6_state_fini(void);
 

net/core/request_sock.c

@@ -32,7 +32,6 @@
  * Further increasing requires to change hash table size.
  */
 int sysctl_max_syn_backlog = 256;
-EXPORT_SYMBOL(sysctl_max_syn_backlog);
 
 int reqsk_queue_alloc(struct request_sock_queue *queue,
 		      const int nr_table_entries)

net/ipv4/fib_frontend.c

@@ -662,5 +662,4 @@ void __init ip_fib_init(void)
 }
 
 EXPORT_SYMBOL(inet_addr_type);
-EXPORT_SYMBOL(ip_dev_find);
 EXPORT_SYMBOL(ip_rt_ioctl);

net/ipv4/inetpeer.c

@@ -459,5 +459,3 @@ static void peer_check_expire(unsigned long dummy)
 				peer_total / inet_peer_threshold * HZ;
 	add_timer(&peer_periodic_timer);
 }
-
-EXPORT_SYMBOL(inet_peer_idlock);

net/ipv4/ip_options.c

@@ -620,6 +620,3 @@ int ip_options_rcv_srr(struct sk_buff *skb)
 	}
 	return 0;
 }
-
-EXPORT_SYMBOL(ip_options_compile);
-EXPORT_SYMBOL(ip_options_undo);

net/ipv4/ip_output.c

@@ -205,7 +205,7 @@ static inline int ip_finish_output2(struct sk_buff *skb)
 	return -EINVAL;
 }
 
-int ip_finish_output(struct sk_buff *skb)
+static int ip_finish_output(struct sk_buff *skb)
 {
 	struct net_device *dev = skb->dst->dev;
 
@@ -1328,12 +1328,7 @@ void __init ip_init(void)
 #endif
 }
 
-EXPORT_SYMBOL(ip_finish_output);
 EXPORT_SYMBOL(ip_fragment);
 EXPORT_SYMBOL(ip_generic_getfrag);
 EXPORT_SYMBOL(ip_queue_xmit);
 EXPORT_SYMBOL(ip_send_check);
-
-#ifdef CONFIG_SYSCTL
-EXPORT_SYMBOL(sysctl_ip_default_ttl);
-#endif

net/ipv4/multipath_drr.c

@@ -107,7 +107,7 @@ static int drr_dev_event(struct notifier_block *this,
 	return NOTIFY_DONE;
 }
 
-struct notifier_block drr_dev_notifier = {
+static struct notifier_block drr_dev_notifier = {
 	.notifier_call	= drr_dev_event,
 };
 

net/ipv4/route.c

@@ -240,7 +240,9 @@ static unsigned			rt_hash_mask;
 static int			rt_hash_log;
 static unsigned int		rt_hash_rnd;
 
-struct rt_cache_stat *rt_cache_stat;
+static struct rt_cache_stat *rt_cache_stat;
+#define RT_CACHE_STAT_INC(field)					  \
+		(per_cpu_ptr(rt_cache_stat, raw_smp_processor_id())->field++)
 
 static int rt_intern_hash(unsigned hash, struct rtable *rth,
 				struct rtable **res);

net/ipv4/xfrm4_state.c

@@ -128,8 +128,10 @@ void __init xfrm4_state_init(void)
 	xfrm_state_register_afinfo(&xfrm4_state_afinfo);
 }
 
+#if 0
 void __exit xfrm4_state_fini(void)
 {
 	xfrm_state_unregister_afinfo(&xfrm4_state_afinfo);
 }
+#endif  /*  0  */