xprtrdma: Remove ro_unmap_safe

Clean up: There are no remaining callers of this method.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

net/sunrpc/xprtrdma/fmr_ops.c

@@ -305,28 +305,9 @@ fmr_op_unmap_sync(struct rpcrdma_xprt *r_xprt, struct list_head *mws)
 	}
 }
 
-/* Use a slow, safe mechanism to invalidate all memory regions
- * that were registered for "req".
- */
-static void
-fmr_op_unmap_safe(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
-		  bool sync)
-{
-	struct rpcrdma_mw *mw;
-
-	while (!list_empty(&req->rl_registered)) {
-		mw = rpcrdma_pop_mw(&req->rl_registered);
-		if (sync)
-			fmr_op_recover_mr(mw);
-		else
-			rpcrdma_defer_mr_recovery(mw);
-	}
-}
-
 const struct rpcrdma_memreg_ops rpcrdma_fmr_memreg_ops = {
 	.ro_map				= fmr_op_map,
 	.ro_unmap_sync			= fmr_op_unmap_sync,
-	.ro_unmap_safe			= fmr_op_unmap_safe,
 	.ro_recover_mr			= fmr_op_recover_mr,
 	.ro_open			= fmr_op_open,
 	.ro_maxpages			= fmr_op_maxpages,

net/sunrpc/xprtrdma/frwr_ops.c

@@ -558,28 +558,9 @@ frwr_op_unmap_sync(struct rpcrdma_xprt *r_xprt, struct list_head *mws)
 	goto unmap;
 }
 
-/* Use a slow, safe mechanism to invalidate all memory regions
- * that were registered for "req".
- */
-static void
-frwr_op_unmap_safe(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req,
-		   bool sync)
-{
-	struct rpcrdma_mw *mw;
-
-	while (!list_empty(&req->rl_registered)) {
-		mw = rpcrdma_pop_mw(&req->rl_registered);
-		if (sync)
-			frwr_op_recover_mr(mw);
-		else
-			rpcrdma_defer_mr_recovery(mw);
-	}
-}
-
 const struct rpcrdma_memreg_ops rpcrdma_frwr_memreg_ops = {
 	.ro_map				= frwr_op_map,
 	.ro_unmap_sync			= frwr_op_unmap_sync,
-	.ro_unmap_safe			= frwr_op_unmap_safe,
 	.ro_recover_mr			= frwr_op_recover_mr,
 	.ro_open			= frwr_op_open,
 	.ro_maxpages			= frwr_op_maxpages,

net/sunrpc/xprtrdma/xprt_rdma.h

@@ -473,8 +473,6 @@ struct rpcrdma_memreg_ops {
 				  struct rpcrdma_mw **);
 	void		(*ro_unmap_sync)(struct rpcrdma_xprt *,
 					 struct list_head *);
-	void		(*ro_unmap_safe)(struct rpcrdma_xprt *,
-					 struct rpcrdma_req *, bool);
 	void		(*ro_recover_mr)(struct rpcrdma_mw *);
 	int		(*ro_open)(struct rpcrdma_ia *,
 				   struct rpcrdma_ep *,