additional clarifications

Author: bashbaug

api/opencl_runtime_layer.asciidoc

@@ -5874,9 +5874,11 @@ include::{generated}/api/protos/clEnqueueReleaseExternalMemObjectsKHR.txt[]
     application to query the status of this command or queue a wait for this
     command to complete.
 
-Applications must release the memory objects that are acquired using
-{clEnqueueReleaseExternalMemObjectsKHR} before using them through any commands
-outside of OpenCL.
+Applications must release memory objects that were acquired using
+{clEnqueueReleaseExternalMemObjectsKHR} before using any external memory
+handles that were specified when the memory objects were created or accessing
+the external memory that these handles represent outside of OpenCL, otherwise
+behavior is undefined.
 This is to guarantee that the state of memory objects is up-to-date and that
 they are accessible outside of OpenCL.