[NETFILTER]: nf_nat: remove unused nf_nat_module_is_loaded

Signed-off-by: NYasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: NPatrick McHardy <kaber@trash.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/netfilter/nf_nat.h

@@ -95,8 +95,6 @@ static inline struct nf_conn_nat *nfct_nat(const struct nf_conn *ct)
 	return nf_ct_ext_find(ct, NF_CT_EXT_NAT);
 }
 
-extern int nf_nat_module_is_loaded;
-
 #else  /* !__KERNEL__: iptables wants this to compile. */
 #define nf_nat_multi_range nf_nat_multi_range_compat
 #endif /*__KERNEL__*/

net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c

@@ -103,9 +103,6 @@ ipv4_prepare(struct sk_buff **pskb, unsigned int hooknum, unsigned int *dataoff,
 	return NF_ACCEPT;
 }
 
-int nf_nat_module_is_loaded = 0;
-EXPORT_SYMBOL_GPL(nf_nat_module_is_loaded);
-
 static u_int32_t ipv4_get_features(const struct nf_conntrack_tuple *tuple)
 {
 	return NF_CT_F_BASIC;

net/ipv4/netfilter/nf_nat_standalone.c

@@ -350,7 +350,6 @@ static int __init nf_nat_standalone_init(void)
 		printk("nf_nat_init: can't register hooks.\n");
 		goto cleanup_rule_init;
 	}
-	nf_nat_module_is_loaded = 1;
 	return ret;
 
  cleanup_rule_init:
@@ -367,7 +366,6 @@ static void __exit nf_nat_standalone_fini(void)
 {
 	nf_unregister_hooks(nf_nat_ops, ARRAY_SIZE(nf_nat_ops));
 	nf_nat_rule_cleanup();
-	nf_nat_module_is_loaded = 0;
 #ifdef CONFIG_XFRM
 	ip_nat_decode_session = NULL;
 	synchronize_net();