diff --git a/libs/surfaceflinger_client/SharedBufferStack.cpp b/libs/surfaceflinger_client/SharedBufferStack.cpp
index c42cd53..d6b2375 100644
--- a/libs/surfaceflinger_client/SharedBufferStack.cpp
+++ b/libs/surfaceflinger_client/SharedBufferStack.cpp
@@ -513,6 +513,7 @@
 
 status_t SharedBufferServer::assertReallocate(int buf)
 {
+    // TODO: need to validate "buf"
     ReallocateCondition condition(this, buf);
     status_t err = waitForCondition(condition);
     return err;