--- a/src/hotspot/share/gc/shared/gcLocker.inline.hpp	Thu Mar 15 21:29:36 2018 +0100
+++ b/src/hotspot/share/gc/shared/gcLocker.inline.hpp	Fri Mar 23 18:54:12 2018 +0100
@@ -26,8 +26,9 @@
 #define SHARE_VM_GC_SHARED_GCLOCKER_INLINE_HPP
 
 #include "gc/shared/gcLocker.hpp"
+#include "runtime/thread.hpp"
 
-inline void GCLocker::lock_critical(JavaThread* thread) {
+void GCLocker::lock_critical(JavaThread* thread) {
   if (!thread->in_critical()) {
     if (needs_gc()) {
       // jni_lock call calls enter_critical under the lock so that the
@@ -40,7 +41,7 @@
   thread->enter_critical();
 }
 
-inline void GCLocker::unlock_critical(JavaThread* thread) {
+void GCLocker::unlock_critical(JavaThread* thread) {
   if (thread->in_last_critical()) {
     if (needs_gc()) {
       // jni_unlock call calls exit_critical under the lock so that