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src/hotspot/share/gc/shared/cardTableBarrierSet.hpp

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@@ -90,10 +90,13 @@
    // If the CollectedHeap was asked to defer a store barrier above,
    // this informs it to flush such a deferred store barrier to the
    // remembered set.
    void flush_deferred_card_mark_barrier(JavaThread* thread);
  
+   // Loom support
+   static constexpr bool is_concurrent_gc() { return false; }
+ 
    // If a compiler is eliding store barriers for TLAB-allocated objects,
    // we will be informed of a slow-path allocation by a call
    // to on_slowpath_allocation_exit() below. Such a call precedes the
    // initialization of the object itself, and no post-store-barriers will
    // be issued. Some heap types require that the barrier strictly follows
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