fix gpu build error

paddle/framework/tensor.h

@@ -117,7 +117,7 @@ class Tensor {
 #ifdef PADDLE_ONLY_CPU
       PADDLE_THROW("'GPUPlace' is not supported in CPU only device.");
 #else
-      GpuMemcpySync(dst_ptr, src_ptr, size, cudaMemcpyDeviceToHost);
+      platform::GpuMemcpySync(dst_ptr, src_ptr, size, cudaMemcpyDeviceToHost);
 #endif
     }
   }

paddle/pybind/pybind.cc

@@ -138,13 +138,12 @@ All parameter, weight, gradient are variables in Paddle.
                   })
 #ifndef PADDLE_ONLY_CPU
       .def_static("gpu_context",
-                  [](paddle::platform::Place& place)
+                  [](paddle::platform::GPUPlace& place)
                       -> paddle::platform::DeviceContext* {
-                    return new paddle::platform::CUDADeviceContext(place);
-                  })
+                        return new paddle::platform::CUDADeviceContext(place);
+                      })
 #endif
-      ;
-
+      ;  // NOLINT
   py::class_<paddle::platform::Place>(m, "GPUPlace").def(py::init<int>());
 
   py::class_<paddle::platform::Place>(m, "CPUPlace").def(py::init<>());

paddle/pybind/tensor_bind.h

@@ -102,7 +102,7 @@ void PyTensorSetFromArray(
 #ifdef PADDLE_ONLY_CPU
     PADDLE_THROW("'GPUPlace' is not supported in CPU only device.");
 #else
-    GpuMemcpySync(
+    platform::GpuMemcpySync(
         dst, array.data(), sizeof(T) * array.size(), cudaMemcpyHostToDevice);
 #endif
   }