Index: /trunk/include/iprt/nt/nt.h
===================================================================
--- /trunk/include/iprt/nt/nt.h	(revision 64236)
+++ /trunk/include/iprt/nt/nt.h	(revision 64237)
@@ -183,4 +183,10 @@
  * Use ntifs.h and wdm.h.
  */
+# if _MSC_VER >= 1200 /* Fix/workaround for KeInitializeSpinLock visibility issue on AMD64. */
+#  define FORCEINLINE static __forceinline
+# else
+#  define FORCEINLINE static __inline
+# endif
+
 # pragma warning(push)
 # ifdef RT_ARCH_X86