diff --git a/include/linux/socket.h b/include/linux/socket.h
index cfcb7e2c3813f..139c330ccf2c3 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -422,13 +422,6 @@ extern long __sys_recvmsg_sock(struct socket *sock, struct msghdr *msg,
 			       struct user_msghdr __user *umsg,
 			       struct sockaddr __user *uaddr,
 			       unsigned int flags);
-extern int sendmsg_copy_msghdr(struct msghdr *msg,
-			       struct user_msghdr __user *umsg, unsigned flags,
-			       struct iovec **iov);
-extern int recvmsg_copy_msghdr(struct msghdr *msg,
-			       struct user_msghdr __user *umsg, unsigned flags,
-			       struct sockaddr __user **uaddr,
-			       struct iovec **iov);
 extern int __copy_msghdr(struct msghdr *kmsg,
 			 struct user_msghdr *umsg,
 			 struct sockaddr __user **save_addr);
diff --git a/net/socket.c b/net/socket.c
index 7e9c8fc9a5b45..e5f3af49a8b62 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2600,9 +2600,9 @@ static int ____sys_sendmsg(struct socket *sock, struct msghdr *msg_sys,
 	return err;
 }
 
-int sendmsg_copy_msghdr(struct msghdr *msg,
-			struct user_msghdr __user *umsg, unsigned flags,
-			struct iovec **iov)
+static int sendmsg_copy_msghdr(struct msghdr *msg,
+			       struct user_msghdr __user *umsg, unsigned flags,
+			       struct iovec **iov)
 {
 	int err;
 
@@ -2753,10 +2753,10 @@ SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg,
 	return __sys_sendmmsg(fd, mmsg, vlen, flags, true);
 }
 
-int recvmsg_copy_msghdr(struct msghdr *msg,
-			struct user_msghdr __user *umsg, unsigned flags,
-			struct sockaddr __user **uaddr,
-			struct iovec **iov)
+static int recvmsg_copy_msghdr(struct msghdr *msg,
+			       struct user_msghdr __user *umsg, unsigned flags,
+			       struct sockaddr __user **uaddr,
+			       struct iovec **iov)
 {
 	ssize_t err;
 
diff --git a/tools/perf/trace/beauty/include/linux/socket.h b/tools/perf/trace/beauty/include/linux/socket.h
index cfcb7e2c3813f..139c330ccf2c3 100644
--- a/tools/perf/trace/beauty/include/linux/socket.h
+++ b/tools/perf/trace/beauty/include/linux/socket.h
@@ -422,13 +422,6 @@ extern long __sys_recvmsg_sock(struct socket *sock, struct msghdr *msg,
 			       struct user_msghdr __user *umsg,
 			       struct sockaddr __user *uaddr,
 			       unsigned int flags);
-extern int sendmsg_copy_msghdr(struct msghdr *msg,
-			       struct user_msghdr __user *umsg, unsigned flags,
-			       struct iovec **iov);
-extern int recvmsg_copy_msghdr(struct msghdr *msg,
-			       struct user_msghdr __user *umsg, unsigned flags,
-			       struct sockaddr __user **uaddr,
-			       struct iovec **iov);
 extern int __copy_msghdr(struct msghdr *kmsg,
 			 struct user_msghdr *umsg,
 			 struct sockaddr __user **save_addr);