diff --git a/paddle/fluid/operators/elementwise/elementwise_mul_mkldnn_op.cc b/paddle/fluid/operators/elementwise/elementwise_mul_mkldnn_op.cc
index 10290a4aeff6b6a023fb28961d12728aff891e83..c600d1e3d76f7a989dd61e72caf4967aa5923c6f 100644
--- a/paddle/fluid/operators/elementwise/elementwise_mul_mkldnn_op.cc
+++ b/paddle/fluid/operators/elementwise/elementwise_mul_mkldnn_op.cc
@@ -19,36 +19,21 @@ limitations under the License. */
 #include "paddle/fluid/platform/mkldnn_helper.h"
 
 #include "paddle/fluid/operators/math/jit_kernel.h"
-#include "xbyak.h"
-#include "xbyak_util.h"
+#include "xbyak/xbyak.h"
+#include "xbyak/xbyak_util.h"
 
 namespace paddle {
 namespace operators {
 
 using framework::DataLayout;
 using mkldnn::memory;
-
-static mkldnn::memory::format StringToMKLDNNFormat(std::string& format) {
-  std::transform(format.begin(), format.end(), format.begin(), ::tolower);
-
-  if (!format.compare("nchw")) {
-    return memory::format::nchw;
-  } else if (!format.compare("nchw16c")) {
-    return memory::format::nChw16c;
-  } else if (!format.compare("nchw8c")) {
-    return memory::format::nChw8c;
-  } else if (!format.compare("nhwc")) {
-    return memory::format::nhwc;
-  } else {
-    return memory::format::any;
-  }
-}
+using platform::StringToMKLDNNFormat;
 
 static void UpdateDataFormat(const framework::ExecutionContext& ctx,
                              framework::Tensor* tensor, const char* attribute) {
   if (ctx.op().HasAttr(attribute)) {
     auto format_as_string = ctx.Attr<std::string>(attribute);
-    auto format = StringToMKLDNNFormat(format_as_string);
+    auto format = StringToMKLDNNFormat(&format_as_string);
     if (format != memory::format::any) {
       tensor->set_format(format);
     }
@@ -93,8 +78,8 @@ class ElementwiseMulMKLDNNKernel : public framework::OpKernel<T> {
     auto y_dims_untrimmed = y->dims();
     auto x_int_dims = paddle::framework::vectorize2int(x_dims);
 
-    UpdateDataFormat(ctx, (Tensor*)x, "x_data_format");
-    UpdateDataFormat(ctx, (Tensor*)y, "y_data_format");
+    UpdateDataFormat(ctx, const_cast<Tensor*>(x), "x_data_format");
+    UpdateDataFormat(ctx, const_cast<Tensor*>(y), "y_data_format");
 
     Xbyak::util::Cpu cpu;
     const bool is_avx512_enabled = cpu.has(Xbyak::util::Cpu::tAVX512F);
@@ -156,10 +141,10 @@ class ElementwiseMulMKLDNNKernel : public framework::OpKernel<T> {
         auto& dev_ctx = ctx.template device_context<MKLDNNDeviceContext>();
         const auto& mkldnn_engine = dev_ctx.GetEngine();
         if (!(is_x_nchw || is_x_nc))
-          ReorderInput<T>((Tensor*)x, ctx.GetPlace(), mkldnn_engine,
+          ReorderInput<T>(const_cast<Tensor*>(x), ctx.GetPlace(), mkldnn_engine,
                           x->dims().size() == 4);
         if (!(is_y_nchw || is_y_nc))
-          ReorderInput<T>((Tensor*)y, ctx.GetPlace(), mkldnn_engine,
+          ReorderInput<T>(const_cast<Tensor*>(y), ctx.GetPlace(), mkldnn_engine,
                           y->dims().size() == 4);
       }
 
diff --git a/paddle/fluid/platform/mkldnn_helper.h b/paddle/fluid/platform/mkldnn_helper.h
index 814012e6c1fad414d10f5a64af283bed57e11fe3..761a9815e098098cb4c4080bd8605dde7f6870a4 100644
--- a/paddle/fluid/platform/mkldnn_helper.h
+++ b/paddle/fluid/platform/mkldnn_helper.h
@@ -14,6 +14,7 @@ limitations under the License. */
 #pragma once
 
 #include <mkldnn.h>
+#include <algorithm>
 #include <string>
 #include <vector>
 #include "paddle/fluid/framework/operator.h"
@@ -292,5 +293,21 @@ inline mkldnn::memory::format data_format_to_memory_format(
   }
 }
 
+inline mkldnn::memory::format StringToMKLDNNFormat(std::string* format) {
+  std::transform(format->begin(), format->end(), format->begin(), ::tolower);
+
+  if (!format->compare("nchw")) {
+    return mkldnn::memory::format::nchw;
+  } else if (!format->compare("nchw16c")) {
+    return mkldnn::memory::format::nChw16c;
+  } else if (!format->compare("nchw8c")) {
+    return mkldnn::memory::format::nChw8c;
+  } else if (!format->compare("nhwc")) {
+    return mkldnn::memory::format::nhwc;
+  } else {
+    return mkldnn::memory::format::any;
+  }
+}
+
 }  // namespace platform
 }  // namespace paddle