net: Remove iocb argument from sendmsg and recvmsg

After TIPC doesn't depend on iocb argument in its internal
implementations of sendmsg() and recvmsg() hooks defined in proto
structure, no any user is using iocb argument in them at all now.
Then we can drop the redundant iocb argument completely from kinds of
implementations of both sendmsg() and recvmsg() in the entire
networking stack.

Cc: Christoph Hellwig <hch@lst.de>
Suggested-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c
index e9f66e1..3648e7f 100644
--- a/net/ipv4/ping.c
+++ b/net/ipv4/ping.c
@@ -684,8 +684,7 @@
 }
 EXPORT_SYMBOL_GPL(ping_common_sendmsg);
 
-static int ping_v4_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
-			   size_t len)
+static int ping_v4_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 {
 	struct net *net = sock_net(sk);
 	struct flowi4 fl4;
@@ -841,8 +840,8 @@
 	goto out;
 }
 
-int ping_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
-		 size_t len, int noblock, int flags, int *addr_len)
+int ping_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock,
+		 int flags, int *addr_len)
 {
 	struct inet_sock *isk = inet_sk(sk);
 	int family = sk->sk_family;