--- a/hotspot/src/share/vm/gc_implementation/g1/g1RootProcessor.cpp	Wed May 06 11:04:44 2015 +0200
+++ b/hotspot/src/share/vm/gc_implementation/g1/g1RootProcessor.cpp	Wed Apr 29 15:12:33 2015 +0300
@@ -329,6 +329,6 @@
   _g1h->g1_rem_set()->oops_into_collection_set_do(scan_rs, &scavenge_cs_nmethods, worker_i);
 }
 
-void G1RootProcessor::set_num_workers(int active_workers) {
+void G1RootProcessor::set_num_workers(uint active_workers) {
   _process_strong_tasks->set_n_threads(active_workers);
 }