net: remove useless parameter of __sock_cmsg_send

The parameter 'msg' has never been used by __sock_cmsg_send, so we can remove it
safely.
Reported-by: NZeal Robot <zealci@zte.com.cn>
Signed-off-by: Nxu xin <xu.xin16@zte.com.cn>
Reviewed-by: NZhang Yunkai <zhang.yunkai@zte.com.cn>
Acked-by: NKuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/sock.h

@@ -1901,7 +1901,7 @@ static inline void sockcm_init(struct sockcm_cookie *sockc,
 	*sockc = (struct sockcm_cookie) { .tsflags = sk->sk_tsflags };
 }
 
-int __sock_cmsg_send(struct sock *sk, struct msghdr *msg, struct cmsghdr *cmsg,
+int __sock_cmsg_send(struct sock *sk, struct cmsghdr *cmsg,
 		     struct sockcm_cookie *sockc);
 int sock_cmsg_send(struct sock *sk, struct msghdr *msg,
 		   struct sockcm_cookie *sockc);

net/core/sock.c

@@ -2744,7 +2744,7 @@ struct sk_buff *sock_alloc_send_pskb(struct sock *sk, unsigned long header_len,
 }
 EXPORT_SYMBOL(sock_alloc_send_pskb);
 
-int __sock_cmsg_send(struct sock *sk, struct msghdr *msg, struct cmsghdr *cmsg,
+int __sock_cmsg_send(struct sock *sk, struct cmsghdr *cmsg,
 		     struct sockcm_cookie *sockc)
 {
 	u32 tsflags;
@@ -2798,7 +2798,7 @@ int sock_cmsg_send(struct sock *sk, struct msghdr *msg,
 			return -EINVAL;
 		if (cmsg->cmsg_level != SOL_SOCKET)
 			continue;
-		ret = __sock_cmsg_send(sk, msg, cmsg, sockc);
+		ret = __sock_cmsg_send(sk, cmsg, sockc);
 		if (ret)
 			return ret;
 	}

net/ipv4/ip_sockglue.c

@@ -267,7 +267,7 @@ int ip_cmsg_send(struct sock *sk, struct msghdr *msg, struct ipcm_cookie *ipc,
 		}
 #endif
 		if (cmsg->cmsg_level == SOL_SOCKET) {
-			err = __sock_cmsg_send(sk, msg, cmsg, &ipc->sockc);
+			err = __sock_cmsg_send(sk, cmsg, &ipc->sockc);
 			if (err)
 				return err;
 			continue;

net/ipv6/datagram.c

@@ -771,7 +771,7 @@ int ip6_datagram_send_ctl(struct net *net, struct sock *sk,
 		}
 
 		if (cmsg->cmsg_level == SOL_SOCKET) {
-			err = __sock_cmsg_send(sk, msg, cmsg, &ipc6->sockc);
+			err = __sock_cmsg_send(sk, cmsg, &ipc6->sockc);
 			if (err)
 				return err;
 			continue;