"add no gradient"

paddle/framework/op_registry.h

@@ -400,6 +400,14 @@ class GradOpRegisterHelper {
     return 0;                                                                  \
   }
 
+/**
+ * Macro to Forbid user register Gradient Operator.
+ */
+#define NO_GRADIENT(__op_type)                          \
+  STATIC_ASSERT_GLOBAL_NAMESPACE(                       \
+      __reg_gradient_op__##__op_type##__op_type##_grad, \
+      "NO_GRADIENT must be in global namespace")
+
 /**
  * Macro to Register OperatorKernel.
  */

paddle/operators/rowwise_add_op.cc

@@ -51,5 +51,8 @@ for i in xrange(X.shape[0]):
 }  // namespace paddle
 
 REGISTER_OP(rowwise_add, ops::RowWiseAddOp, ops::RowWiseAddOpMaker);
+// REGISTER_GRADIENT_OP(rowwise_add, rowwise_add_grad, ops::RowWiseAddGradOp);
+NO_GRADIENT(rowwise_add);
+
 REGISTER_OP_CPU_KERNEL(rowwise_add,
                        ops::RowWiseAddKernel<ops::CPUPlace, float>);