ggml : update comments [no ci]

ggml/include/ggml.h

@@ -2064,7 +2064,7 @@ extern "C" {
     // =================================================================================================
     // CPU-only API for ggml_cgraph
     //
-    // TODO: move as a separate backend
+    // TODO: move to the CPU backend
     // NOTE: avoid using, will be removed
     //
 

ggml/src/ggml-backend.c

@@ -751,10 +751,9 @@ GGML_CALL static ggml_backend_buffer_type_t ggml_backend_cpu_get_default_buffer_
     GGML_UNUSED(backend);
 }
 
-// TODO: this struct should no longer be needed
-//       instead, the new ggml_graph_work_init() + ggml_graph_work_free() API should be enough to replace this
-//       for now, keeping the implementation as it is, to avoid making a mistake
 struct ggml_backend_plan_cpu {
+    // TODO: move member from ggml_cgraph here when the public CPU-only API is removed
+
     struct ggml_cgraph cgraph;
 };
 

ggml/src/ggml-impl.h

@@ -774,6 +774,8 @@ struct ggml_cgraph {
 
     enum ggml_cgraph_eval_order order;
 
+    // TODO: after the CPU-only API is removed, we can move the members below to ggml_backend_plan_cpu
+
     bool      work_own;
     size_t    work_size; // size of work buffer, calculated by `ggml_graph_plan()`
     uint8_t * work_data; // work buffer, to be allocated by caller before calling to `ggml_graph_compute()`