net/ipv4/tcp_authopt.c:820:5: warning: symbol '__tcp_authopt_calc_mac' was not declared. Should it be static?

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: kernel test robot <lkp@intel.com>
---
 tcp_authopt.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/net/ipv4/tcp_authopt.c b/net/ipv4/tcp_authopt.c
index 2a3463ad68967..1b81fa54a9f2a 100644
--- a/net/ipv4/tcp_authopt.c
+++ b/net/ipv4/tcp_authopt.c
@@ -817,11 +817,11 @@ static int tcp_authopt_hash_packet(struct crypto_shash *tfm,
 	return crypto_shash_final(desc, macbuf);
 }
 
-int __tcp_authopt_calc_mac(struct sock *sk,
-			   struct sk_buff *skb,
-			   struct tcp_authopt_key_info *key,
-			   bool input,
-			   char *macbuf)
+static int __tcp_authopt_calc_mac(struct sock *sk,
+				  struct sk_buff *skb,
+				  struct tcp_authopt_key_info *key,
+				  bool input,
+				  char *macbuf)
 {
 	struct crypto_shash *mac_tfm;
 	u8 traffic_key[TCP_AUTHOPT_MAX_TRAFFIC_KEY_LEN];