src/hotspot/share/runtime/thread.hpp

*** 323,333 ****
--- 323,335 ----
    friend class GCLocker;
  
    volatile void* _polling_page;                 // Thread local polling page
  
    ThreadLocalAllocBuffer _tlab;                 // Thread-local eden
+ #ifdef INCLUDE_ALL_GCS
    PLAB*                  _gclab;                // Thread-local allocation buffer for GC (e.g. evacuation)
+ #endif
    jlong _allocated_bytes;                       // Cumulative number of bytes allocated on
                                                  // the Java heap
    mutable TRACE_DATA _trace_data;               // Thread-local data for tracing
  
    ThreadExt _ext;
*** 512,523 ****
--- 514,527 ----
        tlab().initialize();
      }
    }
  
    // Thread-Local GC Allocation Buffer (GCLAB) support
+ #ifdef INCLUDE_ALL_GCS
    PLAB* gclab()                                  { return _gclab; }
    void set_gclab(PLAB* gclab)                    { _gclab = gclab; }
+ #endif
    jlong allocated_bytes()               { return _allocated_bytes; }
    void set_allocated_bytes(jlong value) { _allocated_bytes = value; }
    void incr_allocated_bytes(jlong size) { _allocated_bytes += size; }
    inline jlong cooked_allocated_bytes();