P4 to Git Change 1082950 by lmoriche@lmoriche_opencl_dev on 2014/09/30 16:50:37

ECR #304775 - Implement the changes recommended in review#5943

	Pre-checkin: http://ocltc.amd.com:8111/viewModification.html?modId=40717&personal=true&buildTypeId=&tab=vcsModificationBuilds&show_all_builds=true

Affected files ...

... //depot/stg/opencl/drivers/opencl/runtime/platform/command.cpp#65 edit
... //depot/stg/opencl/drivers/opencl/runtime/platform/memory.cpp#109 edit
... //depot/stg/opencl/drivers/opencl/runtime/thread/semaphore.cpp#7 edit
... //depot/stg/opencl/drivers/opencl/runtime/utils/concurrent.hpp#6 edit


[ROCm/clr commit: aaf533287b]

projects/clr/rocclr/runtime/platform/command.cpp

@@ -129,10 +129,8 @@ Event::setCallback(cl_int status, Event::CallBackFunction callback, void* data)
     }
 
     entry->next_ = callbacks_;
-    while (!callbacks_.compare_exchange_weak(entry->next_, entry)) {
-        // Someone else is also updating the head of the linked list! reload.
-        entry->next_ = callbacks_;
-    }
+    while (!callbacks_.compare_exchange_weak(entry->next_, entry))
+        ; // Someone else is also updating the head of the linked list! reload.
 
     // Check if the event has already reached 'status'
     if (status_ <= status && entry->callback_ != CallBackFunction(0)) {