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/can/bcm.c b/net/can/bcm.c
index d559f92..b523453 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -1231,8 +1231,7 @@
 /*
  * bcm_sendmsg - process BCM commands (opcodes) from the userspace
  */
-static int bcm_sendmsg(struct kiocb *iocb, struct socket *sock,
-		       struct msghdr *msg, size_t size)
+static int bcm_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
 {
 	struct sock *sk = sock->sk;
 	struct bcm_sock *bo = bcm_sk(sk);
@@ -1535,8 +1534,8 @@
 	return 0;
 }
 
-static int bcm_recvmsg(struct kiocb *iocb, struct socket *sock,
-		       struct msghdr *msg, size_t size, int flags)
+static int bcm_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
+		       int flags)
 {
 	struct sock *sk = sock->sk;
 	struct sk_buff *skb;