--- old/src/hotspot/share/gc/z/zHeap.inline.hpp	2019-07-08 17:19:18.062724988 +0000
+++ new/src/hotspot/share/gc/z/zHeap.inline.hpp	2019-07-08 17:19:17.794724710 +0000
@@ -134,6 +134,16 @@
   _page_allocator.check_out_of_memory();
 }
 
+inline void ZHeap::pin_allocating(uintptr_t page_start) {
+  ZPage* page = _page_table.get(page_start);
+  page->pin_allocating();
+}
+
+inline void ZHeap::unpin_allocating(uintptr_t page_start) {
+  ZPage* page = _page_table.get(page_start);
+  page->unpin_allocating();
+}
+
 inline bool ZHeap::is_oop(oop object) const {
   // Verify that we have a good address. Note that ZAddress::is_good()
   // would not be a strong enough verification, since it only verifies