ip*.h: Remove extern from function prototypes

There are a mix of function prototypes with and without extern
in the kernel sources.  Standardize on not using extern for
function prototypes.

Function prototypes don't need to be written with extern.
extern is assumed by the compiler.  Its use is as unnecessary as
using auto to declare automatic/local variables in a block.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/ip6_fib.h

@@ -267,48 +267,41 @@ typedef struct rt6_info *(*pol_lookup_t)(struct net *,
  *	exported functions
  */
 
-extern struct fib6_table        *fib6_get_table(struct net *net, u32 id);
-extern struct fib6_table        *fib6_new_table(struct net *net, u32 id);
-extern struct dst_entry         *fib6_rule_lookup(struct net *net,
-						  struct flowi6 *fl6, int flags,
-						  pol_lookup_t lookup);
+struct fib6_table *fib6_get_table(struct net *net, u32 id);
+struct fib6_table *fib6_new_table(struct net *net, u32 id);
+struct dst_entry *fib6_rule_lookup(struct net *net, struct flowi6 *fl6,
+				   int flags, pol_lookup_t lookup);
 
-extern struct fib6_node		*fib6_lookup(struct fib6_node *root,
-					     const struct in6_addr *daddr,
-					     const struct in6_addr *saddr);
+struct fib6_node *fib6_lookup(struct fib6_node *root,
+			      const struct in6_addr *daddr,
+			      const struct in6_addr *saddr);
 
-struct fib6_node		*fib6_locate(struct fib6_node *root,
-					     const struct in6_addr *daddr, int dst_len,
-					     const struct in6_addr *saddr, int src_len);
+struct fib6_node *fib6_locate(struct fib6_node *root,
+			      const struct in6_addr *daddr, int dst_len,
+			      const struct in6_addr *saddr, int src_len);
 
-extern void			fib6_clean_all_ro(struct net *net,
-					       int (*func)(struct rt6_info *, void *arg),
-					       int prune, void *arg);
+void fib6_clean_all_ro(struct net *net,
+		       int (*func)(struct rt6_info *, void *arg),
+		       int prune, void *arg);
 
-extern void			fib6_clean_all(struct net *net,
-					       int (*func)(struct rt6_info *, void *arg),
-					       int prune, void *arg);
+void fib6_clean_all(struct net *net, int (*func)(struct rt6_info *, void *arg),
+		    int prune, void *arg);
 
-extern int			fib6_add(struct fib6_node *root,
-					 struct rt6_info *rt,
-					 struct nl_info *info);
+int fib6_add(struct fib6_node *root, struct rt6_info *rt, struct nl_info *info);
 
-extern int			fib6_del(struct rt6_info *rt,
-					 struct nl_info *info);
+int fib6_del(struct rt6_info *rt, struct nl_info *info);
 
-extern void			inet6_rt_notify(int event, struct rt6_info *rt,
-						struct nl_info *info);
+void inet6_rt_notify(int event, struct rt6_info *rt, struct nl_info *info);
 
-extern void			fib6_run_gc(unsigned long expires,
-					    struct net *net, bool force);
+void fib6_run_gc(unsigned long expires, struct net *net, bool force);
 
-extern void			fib6_gc_cleanup(void);
+void fib6_gc_cleanup(void);
 
-extern int			fib6_init(void);
+int fib6_init(void);
 
 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
-extern int			fib6_rules_init(void);
-extern void			fib6_rules_cleanup(void);
+int fib6_rules_init(void);
+void fib6_rules_cleanup(void);
 #else
 static inline int               fib6_rules_init(void)
 {

include/net/ip6_route.h

@@ -51,7 +51,7 @@ static inline unsigned int rt6_flags2srcprefs(int flags)
 	return (flags >> 3) & 7;
 }
 
-extern void rt6_bind_peer(struct rt6_info *rt, int create);
+void rt6_bind_peer(struct rt6_info *rt, int create);
 
 static inline struct inet_peer *__rt6_get_peer(struct rt6_info *rt, int create)
 {
@@ -72,70 +72,58 @@ static inline struct inet_peer *rt6_get_peer_create(struct rt6_info *rt)
 	return __rt6_get_peer(rt, 1);
 }
 
-extern void			ip6_route_input(struct sk_buff *skb);
+void ip6_route_input(struct sk_buff *skb);
 
-extern struct dst_entry *	ip6_route_output(struct net *net,
-						 const struct sock *sk,
-						 struct flowi6 *fl6);
-extern struct dst_entry *	ip6_route_lookup(struct net *net,
-						 struct flowi6 *fl6, int flags);
+struct dst_entry *ip6_route_output(struct net *net, const struct sock *sk,
+				   struct flowi6 *fl6);
+struct dst_entry *ip6_route_lookup(struct net *net, struct flowi6 *fl6,
+				   int flags);
 
-extern int			ip6_route_init(void);
-extern void			ip6_route_cleanup(void);
+int ip6_route_init(void);
+void ip6_route_cleanup(void);
 
-extern int			ipv6_route_ioctl(struct net *net,
-						 unsigned int cmd,
-						 void __user *arg);
+int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg);
 
-extern int			ip6_route_add(struct fib6_config *cfg);
-extern int			ip6_ins_rt(struct rt6_info *);
-extern int			ip6_del_rt(struct rt6_info *);
+int ip6_route_add(struct fib6_config *cfg);
+int ip6_ins_rt(struct rt6_info *);
+int ip6_del_rt(struct rt6_info *);
 
-extern int			ip6_route_get_saddr(struct net *net,
-						    struct rt6_info *rt,
-						    const struct in6_addr *daddr,
-						    unsigned int prefs,
-						    struct in6_addr *saddr);
+int ip6_route_get_saddr(struct net *net, struct rt6_info *rt,
+			const struct in6_addr *daddr, unsigned int prefs,
+			struct in6_addr *saddr);
 
-extern struct rt6_info		*rt6_lookup(struct net *net,
-					    const struct in6_addr *daddr,
-					    const struct in6_addr *saddr,
-					    int oif, int flags);
+struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr,
+			    const struct in6_addr *saddr, int oif, int flags);
 
-extern struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
-					 struct flowi6 *fl6);
-extern int icmp6_dst_gc(void);
+struct dst_entry *icmp6_dst_alloc(struct net_device *dev, struct flowi6 *fl6);
+int icmp6_dst_gc(void);
 
-extern void fib6_force_start_gc(struct net *net);
+void fib6_force_start_gc(struct net *net);
 
-extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
-					   const struct in6_addr *addr,
-					   bool anycast);
+struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
+				    const struct in6_addr *addr, bool anycast);
 
 /*
  *	support functions for ND
  *
  */
-extern struct rt6_info *	rt6_get_dflt_router(const struct in6_addr *addr,
-						    struct net_device *dev);
-extern struct rt6_info *	rt6_add_dflt_router(const struct in6_addr *gwaddr,
-						    struct net_device *dev,
-						    unsigned int pref);
-
-extern void			rt6_purge_dflt_routers(struct net *net);
-
-extern int			rt6_route_rcv(struct net_device *dev,
-					      u8 *opt, int len,
-					      const struct in6_addr *gwaddr);
-
-extern void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu,
-			    int oif, u32 mark);
-extern void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk,
-			       __be32 mtu);
-extern void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark);
-extern void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif,
-				   u32 mark);
-extern void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk);
+struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr,
+				     struct net_device *dev);
+struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr,
+				     struct net_device *dev, unsigned int pref);
+
+void rt6_purge_dflt_routers(struct net *net);
+
+int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
+		  const struct in6_addr *gwaddr);
+
+void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu, int oif,
+		     u32 mark);
+void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu);
+void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark);
+void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif,
+			    u32 mark);
+void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk);
 
 struct netlink_callback;
 
@@ -145,10 +133,10 @@ struct rt6_rtnl_dump_arg {
 	struct net *net;
 };
 
-extern int rt6_dump_route(struct rt6_info *rt, void *p_arg);
-extern void rt6_ifdown(struct net *net, struct net_device *dev);
-extern void rt6_mtu_change(struct net_device *dev, unsigned int mtu);
-extern void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);
+int rt6_dump_route(struct rt6_info *rt, void *p_arg);
+void rt6_ifdown(struct net *net, struct net_device *dev);
+void rt6_mtu_change(struct net_device *dev, unsigned int mtu);
+void rt6_remove_prefsrc(struct inet6_ifaddr *ifp);
 
 
 /*

include/net/ip_fib.h

@@ -165,7 +165,7 @@ struct fib_result_nl {
 #define FIB_TABLE_HASHSZ 2
 #endif
 
-extern __be32 fib_info_update_nh_saddr(struct net *net, struct fib_nh *nh);
+__be32 fib_info_update_nh_saddr(struct net *net, struct fib_nh *nh);
 
 #define FIB_RES_SADDR(net, res)				\
 	((FIB_RES_NH(res).nh_saddr_genid ==		\
@@ -187,14 +187,14 @@ struct fib_table {
 	unsigned long		tb_data[0];
 };
 
-extern int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp,
-			    struct fib_result *res, int fib_flags);
-extern int fib_table_insert(struct fib_table *, struct fib_config *);
-extern int fib_table_delete(struct fib_table *, struct fib_config *);
-extern int fib_table_dump(struct fib_table *table, struct sk_buff *skb,
-			  struct netlink_callback *cb);
-extern int fib_table_flush(struct fib_table *table);
-extern void fib_free_table(struct fib_table *tb);
+int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp,
+		     struct fib_result *res, int fib_flags);
+int fib_table_insert(struct fib_table *, struct fib_config *);
+int fib_table_delete(struct fib_table *, struct fib_config *);
+int fib_table_dump(struct fib_table *table, struct sk_buff *skb,
+		   struct netlink_callback *cb);
+int fib_table_flush(struct fib_table *table);
+void fib_free_table(struct fib_table *tb);
 
 
 
@@ -234,14 +234,13 @@ static inline int fib_lookup(struct net *net, const struct flowi4 *flp,
 }
 
 #else /* CONFIG_IP_MULTIPLE_TABLES */
-extern int __net_init fib4_rules_init(struct net *net);
-extern void __net_exit fib4_rules_exit(struct net *net);
+int __net_init fib4_rules_init(struct net *net);
+void __net_exit fib4_rules_exit(struct net *net);
 
-extern struct fib_table *fib_new_table(struct net *net, u32 id);
-extern struct fib_table *fib_get_table(struct net *net, u32 id);
+struct fib_table *fib_new_table(struct net *net, u32 id);
+struct fib_table *fib_get_table(struct net *net, u32 id);
 
-extern int __fib_lookup(struct net *net, struct flowi4 *flp,
-			struct fib_result *res);
+int __fib_lookup(struct net *net, struct flowi4 *flp, struct fib_result *res);
 
 static inline int fib_lookup(struct net *net, struct flowi4 *flp,
 			     struct fib_result *res)
@@ -269,12 +268,12 @@ static inline int fib_lookup(struct net *net, struct flowi4 *flp,
 
 /* Exported by fib_frontend.c */
 extern const struct nla_policy rtm_ipv4_policy[];
-extern void		ip_fib_init(void);
-extern __be32 fib_compute_spec_dst(struct sk_buff *skb);
-extern int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
-			       u8 tos, int oif, struct net_device *dev,
-			       struct in_device *idev, u32 *itag);
-extern void fib_select_default(struct fib_result *res);
+void ip_fib_init(void);
+__be32 fib_compute_spec_dst(struct sk_buff *skb);
+int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
+			u8 tos, int oif, struct net_device *dev,
+			struct in_device *idev, u32 *itag);
+void fib_select_default(struct fib_result *res);
 #ifdef CONFIG_IP_ROUTE_CLASSID
 static inline int fib_num_tclassid_users(struct net *net)
 {
@@ -288,15 +287,15 @@ static inline int fib_num_tclassid_users(struct net *net)
 #endif
 
 /* Exported by fib_semantics.c */
-extern int ip_fib_check_default(__be32 gw, struct net_device *dev);
-extern int fib_sync_down_dev(struct net_device *dev, int force);
-extern int fib_sync_down_addr(struct net *net, __be32 local);
-extern int fib_sync_up(struct net_device *dev);
-extern void fib_select_multipath(struct fib_result *res);
+int ip_fib_check_default(__be32 gw, struct net_device *dev);
+int fib_sync_down_dev(struct net_device *dev, int force);
+int fib_sync_down_addr(struct net *net, __be32 local);
+int fib_sync_up(struct net_device *dev);
+void fib_select_multipath(struct fib_result *res);
 
 /* Exported by fib_trie.c */
-extern void fib_trie_init(void);
-extern struct fib_table *fib_trie_table(u32 id);
+void fib_trie_init(void);
+struct fib_table *fib_trie_table(u32 id);
 
 static inline void fib_combine_itag(u32 *itag, const struct fib_result *res)
 {
@@ -314,7 +313,7 @@ static inline void fib_combine_itag(u32 *itag, const struct fib_result *res)
 #endif
 }
 
-extern void free_fib_info(struct fib_info *fi);
+void free_fib_info(struct fib_info *fi);
 
 static inline void fib_info_put(struct fib_info *fi)
 {
@@ -323,8 +322,8 @@ static inline void fib_info_put(struct fib_info *fi)
 }
 
 #ifdef CONFIG_PROC_FS
-extern int __net_init  fib_proc_init(struct net *net);
-extern void __net_exit fib_proc_exit(struct net *net);
+int __net_init fib_proc_init(struct net *net);
+void __net_exit fib_proc_exit(struct net *net);
 #else
 static inline int fib_proc_init(struct net *net)
 {