fix namespace of GPUContext (#44822)

paddle/fluid/framework/details/reduce_op_handle_test.cc

@@ -69,7 +69,7 @@ struct TestReduceOpHandle {
       for (int i = 0; i < count; ++i) {
         auto p = p::CUDAPlace(i);
         gpu_list_.push_back(p);
-        ctxs_.emplace_back(new p::phi::GPUContext(p));
+        ctxs_.emplace_back(new phi::GPUContext(p));
       }
       nccl_ctxs_.reset(new platform::NCCLContextMap(gpu_list_));
 #else

paddle/fluid/operators/dropout_op_test.cc

@@ -98,7 +98,7 @@ TEST(Dropout, CPUDense) {
 TEST(Dropout, GPUDense) {
   f::Scope scope;
   p::CUDAPlace place;
-  p::phi::GPUContext ctx(place);
+  phi::GPUContext ctx(place);
   Compare(scope, ctx);
 }
 */

paddle/fluid/operators/sparse_attention_op.cu

@@ -881,10 +881,10 @@ class SparseAttentionGradCUDAKernel : public framework::OpKernel<T> {
 }  // namespace paddle
 REGISTER_OP_CUDA_KERNEL(
     sparse_attention,
-    ops::SparseAttentionCUDAKernel<plf::phi::GPUContext, float>,
-    ops::SparseAttentionCUDAKernel<plf::phi::GPUContext, double>);
+    ops::SparseAttentionCUDAKernel<phi::GPUContext, float>,
+    ops::SparseAttentionCUDAKernel<phi::GPUContext, double>);
 
 REGISTER_OP_CUDA_KERNEL(
     sparse_attention_grad,
-    ops::SparseAttentionGradCUDAKernel<plf::phi::GPUContext, float>,
-    ops::SparseAttentionGradCUDAKernel<plf::phi::GPUContext, double>);
+    ops::SparseAttentionGradCUDAKernel<phi::GPUContext, float>,
+    ops::SparseAttentionGradCUDAKernel<phi::GPUContext, double>);