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/drivers/net/tun.c b/drivers/net/tun.c
index 857dca4..b96b94c 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1448,8 +1448,7 @@
 	kill_fasync(&tfile->fasync, SIGIO, POLL_OUT);
 }
 
-static int tun_sendmsg(struct kiocb *iocb, struct socket *sock,
-		       struct msghdr *m, size_t total_len)
+static int tun_sendmsg(struct socket *sock, struct msghdr *m, size_t total_len)
 {
 	int ret;
 	struct tun_file *tfile = container_of(sock, struct tun_file, socket);
@@ -1464,8 +1463,7 @@
 	return ret;
 }
 
-static int tun_recvmsg(struct kiocb *iocb, struct socket *sock,
-		       struct msghdr *m, size_t total_len,
+static int tun_recvmsg(struct socket *sock, struct msghdr *m, size_t total_len,
 		       int flags)
 {
 	struct tun_file *tfile = container_of(sock, struct tun_file, socket);