xprtrdma: Clean up after adding regbuf management

rpcrdma_{de}register_internal() are used only in verbs.c now.

MAX_RPCRDMAHDR is no longer used and can be removed.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

net/sunrpc/xprtrdma/verbs.c

@@ -1729,7 +1729,7 @@ rpcrdma_recv_buffer_put(struct rpcrdma_rep *rep)
  * Wrappers for internal-use kmalloc memory registration, used by buffer code.
  */
 
-int
+static int
 rpcrdma_register_internal(struct rpcrdma_ia *ia, void *va, int len,
 				struct ib_mr **mrp, struct ib_sge *iov)
 {
@@ -1780,7 +1780,7 @@ rpcrdma_register_internal(struct rpcrdma_ia *ia, void *va, int len,
 	return rc;
 }
 
-int
+static int
 rpcrdma_deregister_internal(struct rpcrdma_ia *ia,
 				struct ib_mr *mr, struct ib_sge *iov)
 {

net/sunrpc/xprtrdma/xprt_rdma.h

@@ -171,10 +171,6 @@ enum rpcrdma_chunktype {
 /* temporary static scatter/gather max */
 #define RPCRDMA_MAX_DATA_SEGS	(64)	/* max scatter/gather */
 #define RPCRDMA_MAX_SEGS 	(RPCRDMA_MAX_DATA_SEGS + 2) /* head+tail = 2 */
-#define MAX_RPCRDMAHDR	(\
-	/* max supported RPC/RDMA header */ \
-	sizeof(struct rpcrdma_msg) + (2 * sizeof(u32)) + \
-	(sizeof(struct rpcrdma_read_chunk) * RPCRDMA_MAX_SEGS) + sizeof(u32))
 
 struct rpcrdma_buffer;
 
@@ -401,11 +397,6 @@ void rpcrdma_buffer_put(struct rpcrdma_req *);
 void rpcrdma_recv_buffer_get(struct rpcrdma_req *);
 void rpcrdma_recv_buffer_put(struct rpcrdma_rep *);
 
-int rpcrdma_register_internal(struct rpcrdma_ia *, void *, int,
-				struct ib_mr **, struct ib_sge *);
-int rpcrdma_deregister_internal(struct rpcrdma_ia *,
-				struct ib_mr *, struct ib_sge *);
-
 int rpcrdma_register_external(struct rpcrdma_mr_seg *,
 				int, int, struct rpcrdma_xprt *);
 int rpcrdma_deregister_external(struct rpcrdma_mr_seg *,