[PATCH] RPC: clean up after nocong was removed

 Clean-up:  Move some macros that are specific to the Van Jacobson
 implementation into xprt.c.  Get rid of the cong_wait field in
 rpc_xprt, which is no longer used.  Get rid of xprt_clear_backlog.

 Test-plan:
 Compile with CONFIG_NFS enabled.

 Signed-off-by: Chuck Lever <cel@netapp.com>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 0 insertions, 22 deletions

diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index 559fb471f6f2..dcf0326bda01 100644
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -15,20 +15,6 @@
 #include <linux/sunrpc/sched.h>
 #include <linux/sunrpc/xdr.h>
 
-/*
- * The transport code maintains an estimate on the maximum number of out-
- * standing RPC requests, using a smoothed version of the congestion
- * avoidance implemented in 44BSD. This is basically the Van Jacobson
- * congestion algorithm: If a retransmit occurs, the congestion window is
- * halved; otherwise, it is incremented by 1/cwnd when
- *
- *      -       a reply is received and
- *      -       a full number of requests are outstanding and
- *      -       the congestion window hasn't been updated recently.
- *
- * Upper procedures may check whether a request would block waiting for
- * a free RPC slot by using the RPC_CONGESTED() macro.
- */
 extern unsigned int xprt_udp_slot_table_entries;
 extern unsigned int xprt_tcp_slot_table_entries;
 
@@ -36,12 +22,6 @@ extern unsigned int xprt_tcp_slot_table_entries;
 #define RPC_DEF_SLOT_TABLE      (16U)
 #define RPC_MAX_SLOT_TABLE      (128U)
 
-#define RPC_CWNDSHIFT           (8U)
-#define RPC_CWNDSCALE           (1U << RPC_CWNDSHIFT)
-#define RPC_INITCWND            RPC_CWNDSCALE
-#define RPC_MAXCWND(xprt)       ((xprt)->max_reqs << RPC_CWNDSHIFT)
-#define RPCXPRT_CONGESTED(xprt) ((xprt)->cong >= (xprt)->cwnd)
-
 /* Default timeout values */
 #define RPC_MAX_UDP_TIMEOUT     (60*HZ)
 #define RPC_MAX_TCP_TIMEOUT     (600*HZ)
@@ -213,8 +193,6 @@ struct rpc_xprt {
         void                    (*old_data_ready)(struct sock *, int);
         void                    (*old_state_change)(struct sock *);
         void                    (*old_write_space)(struct sock *);
-
-        wait_queue_head_t       cong_wait;
 };
 
 #define XPRT_LAST_FRAG          (1 << 0)