---
 include/qemu/qemu-plugin.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/qemu/qemu-plugin.h b/include/qemu/qemu-plugin.h
index 21f056d4ab..655640fe54 100644
--- a/include/qemu/qemu-plugin.h
+++ b/include/qemu/qemu-plugin.h
@@ -169,6 +169,7 @@ enum qemu_plugin_mem_rw {
  * callbacks to be triggered when the block or individual instruction
  * executes.
  */
+/* ??? - should we expose vcpu_index here? */
 typedef void (*qemu_plugin_vcpu_tb_trans_cb_t)(qemu_plugin_id_t id,
                                                unsigned int vcpu_index,
                                                struct qemu_plugin_tb *tb);
-- 
2.20.1