--- old/src/hotspot/os_cpu/linux_x86/os_linux_x86.hpp	2020-07-17 11:07:04.253099535 -0700
+++ new/src/hotspot/os_cpu/linux_x86/os_linux_x86.hpp	2020-07-17 11:07:04.066099526 -0700
@@ -27,6 +27,7 @@
 
   static void setup_fpu();
   static bool supports_sse();
+  static juint cpu_microcode_revision();
 
   static jlong rdtsc();