rds: remove redundant variable total_payload_len

Variable total_payload_len is being used to accumulate payload lengths
however it is never read or used afterwards. It is redundant and can
be removed.

Signed-off-by: Colin Ian King <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/rds/send.c

···
 	struct rds_conn_path *cpath;
 	struct in6_addr daddr;
 	__u32 scope_id = 0;
-	size_t total_payload_len = payload_len, rdma_payload_len = 0;
+	size_t rdma_payload_len = 0;
 	bool zcopy = ((msg->msg_flags & MSG_ZEROCOPY) &&
 		      sock_flag(rds_rs_to_sk(rs), SOCK_ZEROCOPY));
 	int num_sgs = DIV_ROUND_UP(payload_len, PAGE_SIZE);
···
 	if (ret)
 		goto out;
 
-	total_payload_len += rdma_payload_len;
 	if (max_t(size_t, payload_len, rdma_payload_len) > RDS_MAX_MSG_SIZE) {
 		ret = -EMSGSIZE;
 		goto out;