--- old/src/os/linux/vm/os_linux.cpp	2015-06-22 16:01:34.912902008 +0200
+++ new/src/os/linux/vm/os_linux.cpp	2015-06-22 16:01:34.756896691 +0200
@@ -2393,40 +2393,7 @@
   return CAST_FROM_FN_PTR(void*, UserHandler);
 }
 
-class Semaphore : public StackObj {
- public:
-  Semaphore();
-  ~Semaphore();
-  void signal();
-  void wait();
-  bool trywait();
-  bool timedwait(unsigned int sec, int nsec);
- private:
-  sem_t _semaphore;
-};
-
-Semaphore::Semaphore() {
-  sem_init(&_semaphore, 0, 0);
-}
-
-Semaphore::~Semaphore() {
-  sem_destroy(&_semaphore);
-}
-
-void Semaphore::signal() {
-  sem_post(&_semaphore);
-}
-
-void Semaphore::wait() {
-  sem_wait(&_semaphore);
-}
-
-bool Semaphore::trywait() {
-  return sem_trywait(&_semaphore) == 0;
-}
-
-bool Semaphore::timedwait(unsigned int sec, int nsec) {
-
+struct timespec os::PosixSemaphore::create_timespec(unsigned int sec, int nsec) {
   struct timespec ts;
   // Semaphore's are always associated with CLOCK_REALTIME
   os::Linux::clock_gettime(CLOCK_REALTIME, &ts);
@@ -2443,18 +2410,7 @@
     }
   }
 
-  while (1) {
-    int result = sem_timedwait(&_semaphore, &ts);
-    if (result == 0) {
-      return true;
-    } else if (errno == EINTR) {
-      continue;
-    } else if (errno == ETIMEDOUT) {
-      return false;
-    } else {
-      return false;
-    }
-  }
+  return ts;
 }
 
 extern "C" {
@@ -2494,7 +2450,7 @@
 
 // Linux(POSIX) specific hand shaking semaphore.
 static sem_t sig_sem;
-static Semaphore sr_semaphore;
+static os::PosixSemaphore sr_semaphore;
 
 void os::signal_init_pd() {
   // Initialize signal structures