--- old/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp	2014-10-15 14:20:30.668808521 +0200
+++ new/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp	2014-10-15 14:20:30.560812297 +0200
@@ -887,10 +887,8 @@
   // along with all the other pointers into the heap but
   // compaction is expected to be a rare event with
   // a heap using cms so don't do it without seeing the need.
-  if (CollectedHeap::use_parallel_gc_threads()) {
-    for (uint i = 0; i < ParallelGCThreads; i++) {
-      _par_gc_thread_states[i]->promo.reset();
-    }
+  for (uint i = 0; i < ParallelGCThreads; i++) {
+    _par_gc_thread_states[i]->promo.reset();
   }
 }
 
@@ -2804,10 +2802,8 @@
   collector()->gc_epilogue(full);
 
   // Also reset promotion tracking in par gc thread states.
-  if (CollectedHeap::use_parallel_gc_threads()) {
-    for (uint i = 0; i < ParallelGCThreads; i++) {
-      _par_gc_thread_states[i]->promo.stopTrackingPromotions(i);
-    }
+  for (uint i = 0; i < ParallelGCThreads; i++) {
+    _par_gc_thread_states[i]->promo.stopTrackingPromotions(i);
   }
 }
 
--- old/src/share/vm/gc_implementation/parallelScavenge/generationSizer.cpp	2014-10-15 14:20:31.372783906 +0200
+++ new/src/share/vm/gc_implementation/parallelScavenge/generationSizer.cpp	2014-10-15 14:20:31.268787542 +0200
@@ -47,11 +47,6 @@
   // Do basic sizing work
   GenCollectorPolicy::initialize_flags();
 
-  assert(UseSerialGC ||
-          !FLAG_IS_DEFAULT(ParallelGCThreads) ||
-          (ParallelGCThreads > 0),
-         "ParallelGCThreads should be set before flag initialization");
-
   // The survivor ratio's are calculated "raw", unlike the
   // default gc, which adds 2 to the ratio value. We need to
   // make sure the values are valid before using them.
--- old/src/share/vm/memory/freeBlockDictionary.cpp	2014-10-15 14:20:31.928764466 +0200
+++ new/src/share/vm/memory/freeBlockDictionary.cpp	2014-10-15 14:20:31.828767962 +0200
@@ -43,12 +43,10 @@
 
 template <class Chunk> void FreeBlockDictionary<Chunk>::verify_par_locked() const {
 #ifdef ASSERT
-  if (ParallelGCThreads > 0) {
-    Thread* my_thread = Thread::current();
-    if (my_thread->is_GC_task_thread()) {
-      assert(par_lock() != NULL, "Should be using locking?");
-      assert_lock_strong(par_lock());
-    }
+  Thread* my_thread = Thread::current();
+  if (my_thread->is_GC_task_thread()) {
+    assert(par_lock() != NULL, "Should be using locking?");
+    assert_lock_strong(par_lock());
   }
 #endif // ASSERT
 }