unify cpu context (#44049)

paddle/fluid/eager/api/generated/eager_generated/backwards/scale_node.cc

@@ -117,15 +117,15 @@ void ScaleAPI(const paddle::experimental::Tensor& x,
       paddle::platform::DeviceContextPool::Instance();
 
   if (expected_kernel_place == paddle::platform::CPUPlace()) {
-    auto* dev_ctx = dynamic_cast<paddle::platform::CPUDeviceContext*>(
-        pool.Get(expected_kernel_place));
+    auto* dev_ctx =
+        dynamic_cast<phi::CPUContext*>(pool.Get(expected_kernel_place));
     if (!dev_ctx) {
       PADDLE_THROW(paddle::platform::errors::Fatal(
-          "Cannot convert device_context to CPUDeviceContext."
+          "Cannot convert device_context to phi::CPUContext."
           "This indicates backend mismatch."
           "Pleas double check your expected place"));
     }
-    ScaleDeviceDispatch<paddle::platform::CPUDeviceContext>(*dense_tensor.get(),
+    ScaleDeviceDispatch<phi::CPUContext>(*dense_tensor.get(),
                                          *dev_ctx,
                                          scale,
                                          bias,

paddle/fluid/platform/device_context.h

@@ -133,7 +133,6 @@ constexpr DeviceType kIPU = DeviceType::IPU;
 constexpr DeviceType kMLU = DeviceType::MLU;
 
 using DeviceContext = phi::DeviceContext;
-using CPUDeviceContext = phi::CPUContext;
 
 template <typename Place>
 struct DefaultDeviceContextType;