net/rds: Remove unused function declarations

Commit 39de8281 ("RDS: Main header file") declared but never implemented
rds_trans_init() and rds_trans_exit(), remove it.
Commit d37c9359 ("RDS: Move loop-only function to loop.c") removed the
implementation rds_message_inc_free() but not the declaration.

Since commit 55b7ed0b ("RDS: Common RDMA transport code")
rds_rdma_conn_connect() is never implemented and used.
rds_tcp_map_seq() is never implemented and used since
commit 70041088 ("RDS: Add TCP transport to RDS").
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/rds/rdma_transport.h

@@ -17,7 +17,6 @@
  */
 #define RDS_RDMA_REJ_INCOMPAT		1
 
-int rds_rdma_conn_connect(struct rds_connection *conn);
 int rds_rdma_cm_event_handler(struct rdma_cm_id *cm_id,
 			      struct rdma_cm_event *event);
 int rds6_rdma_cm_event_handler(struct rdma_cm_id *cm_id,

net/rds/rds.h

@@ -863,7 +863,6 @@ int rds_message_next_extension(struct rds_header *hdr,
 			       unsigned int *pos, void *buf, unsigned int *buflen);
 int rds_message_add_rdma_dest_extension(struct rds_header *hdr, u32 r_key, u32 offset);
 int rds_message_inc_copy_to_user(struct rds_incoming *inc, struct iov_iter *to);
-void rds_message_inc_free(struct rds_incoming *inc);
 void rds_message_addref(struct rds_message *rm);
 void rds_message_put(struct rds_message *rm);
 void rds_message_wait(struct rds_message *rm);
@@ -1013,7 +1012,5 @@ void rds_trans_put(struct rds_transport *trans);
 unsigned int rds_trans_stats_info_copy(struct rds_info_iterator *iter,
 				       unsigned int avail);
 struct rds_transport *rds_trans_get(int t_type);
-int rds_trans_init(void);
-void rds_trans_exit(void);
 
 #endif

net/rds/tcp.h

@@ -56,7 +56,6 @@ void rds_tcp_restore_callbacks(struct socket *sock,
 			       struct rds_tcp_connection *tc);
 u32 rds_tcp_write_seq(struct rds_tcp_connection *tc);
 u32 rds_tcp_snd_una(struct rds_tcp_connection *tc);
-u64 rds_tcp_map_seq(struct rds_tcp_connection *tc, u32 seq);
 extern struct rds_transport rds_tcp_transport;
 void rds_tcp_accept_work(struct sock *sk);
 int rds_tcp_laddr_check(struct net *net, const struct in6_addr *addr,