[PATCH 4/6] tcp: Don't export tcp_update_csum()

[David Gibson <david@gibson.dropbear.id.au>]

tcp_update_csum() is exposed in tcp_internal.h, but is only used in tcp.c.
Remove the unneded prototype and make it static.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 tcp.c          | 3 ++-
 tcp_internal.h | 2 --
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/tcp.c b/tcp.c
index 1db16095..b8a01cc6 100644
--- a/tcp.c
+++ b/tcp.c
@@ -787,7 +787,8 @@ static void tcp_sock_set_nodelay(int s)
  * @th:		TCP header (updated)
  * @payload:	TCP payload
  */
-void tcp_update_csum(uint32_t psum, struct tcphdr *th, struct iov_tail *payload)
+static void tcp_update_csum(uint32_t psum, struct tcphdr *th,
+			    struct iov_tail *payload)
 {
 	th->check = 0;
 	psum = csum_unfolded(th, sizeof(*th), psum);
diff --git a/tcp_internal.h b/tcp_internal.h
index 9cf31f53..6f5e054c 100644
--- a/tcp_internal.h
+++ b/tcp_internal.h
@@ -166,8 +166,6 @@ void tcp_rst_do(const struct ctx *c, struct tcp_tap_conn *conn);
 
 struct tcp_info_linux;
 
-void tcp_update_csum(uint32_t psum, struct tcphdr *th,
-		     struct iov_tail *payload);
 void tcp_fill_headers(const struct tcp_tap_conn *conn,
 		      struct tap_hdr *taph,
 		      struct iphdr *ip4h, struct ipv6hdr *ip6h,
-- 
@@ -166,8 +166,6 @@ void tcp_rst_do(const struct ctx *c, struct tcp_tap_conn *conn);
 
 struct tcp_info_linux;
 
-void tcp_update_csum(uint32_t psum, struct tcphdr *th,
-		     struct iov_tail *payload);
 void tcp_fill_headers(const struct tcp_tap_conn *conn,
 		      struct tap_hdr *taph,
 		      struct iphdr *ip4h, struct ipv6hdr *ip6h,
-- 
2.48.1