RDS: Implement silent atomics

Signed-off-by: Andy Grover <andy.grover@oracle.com>
diff --git a/net/rds/message.c b/net/rds/message.c
index 3ea05c8..a27e493 100644
--- a/net/rds/message.c
+++ b/net/rds/message.c
@@ -325,6 +325,8 @@
 			sg++;
 	}
 
+	rm->data.op_active = 1;
+
 out:
 	return ret;
 }