diff --git a/src/audio/mux/mux.c b/src/audio/mux/mux.c
index 3c0f9a8f5b38..2d1f35534dd9 100644
--- a/src/audio/mux/mux.c
+++ b/src/audio/mux/mux.c
@@ -450,7 +450,7 @@ static int demux_trigger(struct processing_module *mod, int cmd)
 	 */
 	if (cmd == COMP_TRIGGER_PRE_START) {
 		list_for_item(li, &mod->dev->bsink_list) {
-			b = container_of(li, struct comp_buffer, source_list);
+			b = container_of(li, struct comp_buffer, source_list);	//msz ?????
 			if (b->sink->pipeline != mod->dev->pipeline)
 				audio_stream_set_overrun(&b->stream, true);
 		}
diff --git a/src/ipc/ipc-helper.c b/src/ipc/ipc-helper.c
index b9f11811a8f0..2e23c6420646 100644
--- a/src/ipc/ipc-helper.c
+++ b/src/ipc/ipc-helper.c
@@ -136,11 +136,9 @@ int comp_verify_params(struct comp_dev *dev, uint32_t flag,
 	 */
 	if (list_is_empty(source_list) != list_is_empty(sink_list)) {
 		if (list_is_empty(sink_list))
-			buf = list_first_item(source_list,
-					      struct comp_buffer,
-					      sink_list);
+			buf = list_first_item(source_list, struct comp_buffer, sink_list); //msz
 		else
-			buf = list_first_item(sink_list, struct comp_buffer, source_list);
+			buf = list_first_item(sink_list, struct comp_buffer, source_list); //msz
 
 		/* update specific pcm parameter with buffer parameter if
 		 * specific flag is set.
@@ -314,8 +312,7 @@ int ipc_comp_free(struct ipc *ipc, uint32_t comp_id)
 	}
 
 	list_for_item_safe(clist, tmp, &icd->cd->bsink_list) {
-		struct comp_buffer *buffer = container_of(clist, struct comp_buffer, source_list);
-
+		struct comp_buffer *buffer = container_of(clist, struct comp_buffer, source_list); //msz ???
 		buffer->source = NULL;
 		/* Also if it isn't shared - we are about to modify uncached data */
 		dcache_writeback_invalidate_region(uncache_to_cache(buffer),
diff --git a/test/cmocka/src/util.h b/test/cmocka/src/util.h
index 5ef231ceba64..abd2633e9b5d 100644
--- a/test/cmocka/src/util.h
+++ b/test/cmocka/src/util.h
@@ -29,7 +29,7 @@ static inline struct comp_buffer *create_test_sink(struct comp_dev *dev,
 
 	/* set bsink list */
 	if (dev)
-		list_item_append(&buffer->source_list, &dev->bsink_list);
+		list_item_append(&buffer->source_list, &dev->bsink_list);  //msz
 
 	/* alloc sink and set default parameters */
 	buffer->sink = calloc(1, sizeof(struct comp_dev));