diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c
index 1f1b2dd..746427c 100644
--- a/net/ipv4/ping.c
+++ b/net/ipv4/ping.c
@@ -283,8 +283,8 @@
 EXPORT_SYMBOL_GPL(ping_close);
 
 /* Checks the bind address and possibly modifies sk->sk_bound_dev_if. */
-int ping_check_bind_addr(struct sock *sk, struct inet_sock *isk,
-			 struct sockaddr *uaddr, int addr_len) {
+static int ping_check_bind_addr(struct sock *sk, struct inet_sock *isk,
+				struct sockaddr *uaddr, int addr_len) {
 	struct net *net = sock_net(sk);
 	if (sk->sk_family == AF_INET) {
 		struct sockaddr_in *addr = (struct sockaddr_in *) uaddr;
@@ -352,7 +352,7 @@
 	return 0;
 }
 
-void ping_set_saddr(struct sock *sk, struct sockaddr *saddr)
+static void ping_set_saddr(struct sock *sk, struct sockaddr *saddr)
 {
 	if (saddr->sa_family == AF_INET) {
 		struct inet_sock *isk = inet_sk(sk);
@@ -367,7 +367,7 @@
 	}
 }
 
-void ping_clear_saddr(struct sock *sk, int dif)
+static void ping_clear_saddr(struct sock *sk, int dif)
 {
 	sk->sk_bound_dev_if = dif;
 	if (sk->sk_family == AF_INET) {
diff --git a/net/ipv6/ping.c b/net/ipv6/ping.c
index a431103..2b52046 100644
--- a/net/ipv6/ping.c
+++ b/net/ipv6/ping.c
@@ -57,23 +57,23 @@
 
 
 /* Compatibility glue so we can support IPv6 when it's compiled as a module */
-int dummy_ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len)
+static int dummy_ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len)
 {
 	return -EAFNOSUPPORT;
 }
-int dummy_ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg,
-				 struct sk_buff *skb)
+static int dummy_ip6_datagram_recv_ctl(struct sock *sk, struct msghdr *msg,
+				       struct sk_buff *skb)
 {
 	return -EAFNOSUPPORT;
 }
-int dummy_icmpv6_err_convert(u8 type, u8 code, int *err)
+static int dummy_icmpv6_err_convert(u8 type, u8 code, int *err)
 {
 	return -EAFNOSUPPORT;
 }
-void dummy_ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
-			    __be16 port, u32 info, u8 *payload) {}
-int dummy_ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
-			const struct net_device *dev, int strict)
+static void dummy_ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
+				  __be16 port, u32 info, u8 *payload) {}
+static int dummy_ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
+			       const struct net_device *dev, int strict)
 {
 	return 0;
 }
@@ -198,7 +198,7 @@
 	return ping_seq_start(seq, pos, AF_INET6);
 }
 
-int ping_v6_seq_show(struct seq_file *seq, void *v)
+static int ping_v6_seq_show(struct seq_file *seq, void *v)
 {
 	if (v == SEQ_START_TOKEN) {
 		seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);