2140     MutexLocker mu1(SystemDictionary_lock, THREAD);

  2140     MutexLocker mu1(SystemDictionary_lock, THREAD);

  2141 

  2141 

  2142     // See whether biased locking is enabled and if so set it for this

  2142     // See whether biased locking is enabled and if so set it for this

  2143     // klass.

  2143     // klass.

  2144     // Note that this must be done past the last potential blocking

  2144     // Note that this must be done past the last potential blocking

  2146     // VM_Operation to iterate the SystemDictionary and installing the

  2146     // VM_Operation to iterate the SystemDictionary and installing the

  2147     // biasable mark word into each InstanceKlass's prototype header.

  2147     // biasable mark word into each InstanceKlass's prototype header.

  2148     // To avoid race conditions where we accidentally miss enabling the

  2148     // To avoid race conditions where we accidentally miss enabling the

  2149     // optimization for one class in the process of being added to the

  2149     // optimization for one class in the process of being added to the

  2150     // dictionary, we must not safepoint after the test of

  2150     // dictionary, we must not safepoint after the test of