diff -r 2b5380bc0926 -r bb0ea482a99e hotspot/src/share/vm/gc_implementation/shared/vmGCOperations.cpp
--- a/hotspot/src/share/vm/gc_implementation/shared/vmGCOperations.cpp	Sat Feb 15 14:41:04 2014 -0500
+++ b/hotspot/src/share/vm/gc_implementation/shared/vmGCOperations.cpp	Tue Feb 18 09:15:40 2014 +0100
@@ -41,33 +41,18 @@
 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
 #endif // INCLUDE_ALL_GCS
 
-#ifndef USDT2
-HS_DTRACE_PROBE_DECL1(hotspot, gc__begin, bool);
-HS_DTRACE_PROBE_DECL(hotspot, gc__end);
-#endif /* !USDT2 */
-
 // The same dtrace probe can't be inserted in two different files, so we
 // have to call it here, so it's only in one file.  Can't create new probes
 // for the other file anymore.   The dtrace probes have to remain stable.
 void VM_GC_Operation::notify_gc_begin(bool full) {
-#ifndef USDT2
-  HS_DTRACE_PROBE1(hotspot, gc__begin, full);
-  HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
-#else /* USDT2 */
   HOTSPOT_GC_BEGIN(
                    full);
   HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
-#endif /* USDT2 */
 }
 
 void VM_GC_Operation::notify_gc_end() {
-#ifndef USDT2
-  HS_DTRACE_PROBE(hotspot, gc__end);
-  HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
-#else /* USDT2 */
   HOTSPOT_GC_END();
   HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
-#endif /* USDT2 */
 }
 
 void VM_GC_Operation::acquire_pending_list_lock() {