--- old/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp	Thu Sep 19 17:39:39 2013
+++ new/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp	Thu Sep 19 17:39:34 2013
@@ -100,7 +100,7 @@
                               ConcurrentG1Refine* cg1r) :
     _sts(sts), _g1rs(g1rs), _cg1r(cg1r), _concurrent(true)
   {}
-  bool do_card_ptr(jbyte* card_ptr, int worker_i) {
+  bool do_card_ptr(jbyte* card_ptr, uint worker_i) {
     bool oops_into_cset = _g1rs->refine_card(card_ptr, worker_i, false);
     // This path is executed by the concurrent refine or mutator threads,
     // concurrently, and so we do not care if card_ptr contains references
@@ -131,7 +131,7 @@
     _ctbs = (CardTableModRefBS*)_g1h->barrier_set();
     for (int i = 0; i < 256; i++) _histo[i] = 0;
   }
-  bool do_card_ptr(jbyte* card_ptr, int worker_i) {
+  bool do_card_ptr(jbyte* card_ptr, uint worker_i) {
     if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) {
       _calls++;
       unsigned char* ujb = (unsigned char*)card_ptr;
@@ -163,7 +163,7 @@
     _g1h = G1CollectedHeap::heap();
     _ctbs = (CardTableModRefBS*)_g1h->barrier_set();
   }
-  bool do_card_ptr(jbyte* card_ptr, int worker_i) {
+  bool do_card_ptr(jbyte* card_ptr, uint worker_i) {
     if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) {
       _calls++;
       *card_ptr = 0;
@@ -175,7 +175,7 @@
 
 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure {
 public:
-  bool do_card_ptr(jbyte* card_ptr, int worker_i) {
+  bool do_card_ptr(jbyte* card_ptr, uint worker_i) {
     *card_ptr = CardTableModRefBS::dirty_card_val();
     return true;
   }
@@ -1212,9 +1212,9 @@
 class RebuildRSOutOfRegionClosure: public HeapRegionClosure {
   G1CollectedHeap*   _g1h;
   UpdateRSOopClosure _cl;
-  int                _worker_i;
+  uint               _worker_i;
 public:
-  RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) :
+  RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, uint worker_i = 0) :
     _cl(g1->g1_rem_set(), worker_i),
     _worker_i(worker_i),
     _g1h(g1)
@@ -2323,7 +2323,7 @@
 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl,
                                                  DirtyCardQueue* into_cset_dcq,
                                                  bool concurrent,
-                                                 int worker_i) {
+                                                 uint worker_i) {
   // Clean cards in the hot card cache
   G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache();
   hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq);
@@ -2867,7 +2867,7 @@
 
 // Given the id of a worker, obtain or calculate a suitable
 // starting region for iterating over the current collection set.
-HeapRegion* G1CollectedHeap::start_cset_region_for_worker(int worker_i) {
+HeapRegion* G1CollectedHeap::start_cset_region_for_worker(uint worker_i) {
   assert(get_gc_time_stamp() > 0, "should have been updated by now");
 
   HeapRegion* result = NULL;
@@ -5125,7 +5125,7 @@
                         OopClosure* scan_non_heap_roots,
                         OopsInHeapRegionClosure* scan_rs,
                         G1KlassScanClosure* scan_klasses,
-                        int worker_i) {
+                        uint worker_i) {
 
   // First scan the strong roots
   double ext_roots_start = os::elapsedTime();