Since commit a3d2599b2446 ("ipv{4,6}/udp{,lite}: simplify proc
registration"), udp4_seq_show() and udp6_seq_show() are not
used in net/ipv4/udplite.c and net/ipv6/udplite.c.

Instead, udp_seq_ops and udp6_seq_ops are exposed to UDP-Lite.

Let's make udp4_seq_show() and udp6_seq_show() static.

udp_seq_ops and udp6_seq_ops are moved to udp_impl.h so that
we can make them static when the header is removed.

Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
---
 include/net/udp.h   | 3 ---
 net/ipv4/udp.c      | 3 +--
 net/ipv4/udp_impl.h | 2 +-
 net/ipv6/udp.c      | 3 +--
 net/ipv6/udp_impl.h | 2 +-
 5 files changed, 4 insertions(+), 9 deletions(-)

diff --git a/include/net/udp.h b/include/net/udp.h
index b648003e5792..f51a51c0e468 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -576,9 +576,6 @@ void *udp_seq_start(struct seq_file *seq, loff_t *pos);
 void *udp_seq_next(struct seq_file *seq, void *v, loff_t *pos);
 void udp_seq_stop(struct seq_file *seq, void *v);
 
-extern const struct seq_operations udp_seq_ops;
-extern const struct seq_operations udp6_seq_ops;
-
 int udp4_proc_init(void);
 void udp4_proc_exit(void);
 #endif /* CONFIG_PROC_FS */
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 668a0284c3d5..1fcdc5482594 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -3443,7 +3443,7 @@ static void udp4_format_sock(struct sock *sp, struct seq_file *f,
 		sk_drops_read(sp));
 }
 
-int udp4_seq_show(struct seq_file *seq, void *v)
+static int udp4_seq_show(struct seq_file *seq, void *v)
 {
 	seq_setwidth(seq, 127);
 	if (v == SEQ_START_TOKEN)
@@ -3753,7 +3753,6 @@ const struct seq_operations udp_seq_ops = {
 	.stop		= udp_seq_stop,
 	.show		= udp4_seq_show,
 };
-EXPORT_IPV6_MOD(udp_seq_ops);
 
 static struct udp_seq_afinfo udp4_seq_afinfo = {
 	.family		= AF_INET,
diff --git a/net/ipv4/udp_impl.h b/net/ipv4/udp_impl.h
index 17a6fa8b1409..0ca4384f9afa 100644
--- a/net/ipv4/udp_impl.h
+++ b/net/ipv4/udp_impl.h
@@ -22,6 +22,6 @@ int udp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int flags);
 void udp_destroy_sock(struct sock *sk);
 
 #ifdef CONFIG_PROC_FS
-int udp4_seq_show(struct seq_file *seq, void *v);
+extern const struct seq_operations udp_seq_ops;
 #endif
 #endif	/* _UDP4_IMPL_H */
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 5a3984e59c90..5fef1c226697 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1903,7 +1903,7 @@ int udpv6_getsockopt(struct sock *sk, int level, int optname,
 
 /* ------------------------------------------------------------------------ */
 #ifdef CONFIG_PROC_FS
-int udp6_seq_show(struct seq_file *seq, void *v)
+static int udp6_seq_show(struct seq_file *seq, void *v)
 {
 	if (v == SEQ_START_TOKEN) {
 		seq_puts(seq, IPV6_SEQ_DGRAM_HEADER);
@@ -1924,7 +1924,6 @@ const struct seq_operations udp6_seq_ops = {
 	.stop		= udp_seq_stop,
 	.show		= udp6_seq_show,
 };
-EXPORT_SYMBOL(udp6_seq_ops);
 
 static struct udp_seq_afinfo udp6_seq_afinfo = {
 	.family		= AF_INET6,
diff --git a/net/ipv6/udp_impl.h b/net/ipv6/udp_impl.h
index 1bd4a573e1bb..525ea600228a 100644
--- a/net/ipv6/udp_impl.h
+++ b/net/ipv6/udp_impl.h
@@ -26,6 +26,6 @@ int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int flags);
 void udpv6_destroy_sock(struct sock *sk);
 
 #ifdef CONFIG_PROC_FS
-int udp6_seq_show(struct seq_file *seq, void *v);
+extern const struct seq_operations udp6_seq_ops;
 #endif
 #endif	/* _UDP6_IMPL_H */
-- 
2.53.0.473.g4a7958ca14-goog