[PATCH] net: socket: add missing declaration for update_socket_protocol

[Chia-Liang Wang <wjliang627@gmail.com>]

When building with C=1, sparse reports the following warning:

net/socket.c:1735:21: warning: symbol 'update_socket_protocol' was not declared. Should it be static?

The function update_socket_protocol() is defined as __weak, intended
to be overwritten by architecture-specific implementations. Therefore,
it cannot be static.

Add a declaration in include/net/sock.h to fix this sparse warning.

Signed-off-by: Chia-Liang Wang <a0979625527@icloud.com>
---
 include/net/sock.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/net/sock.h b/include/net/sock.h
index 60bcb13f045c..2081b6599edc 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -3103,4 +3103,6 @@ static inline bool sk_is_readable(struct sock *sk)
 
 	return false;
 }
+
+int update_socket_protocol(int family, int type, int protocol);
 #endif	/* _SOCK_H */
-- 
2.43.0