diff -r 7f36d4436074 -r 19abd13c87b8 src/mem/cache/cache.hh
--- a/src/mem/cache/cache.hh	Tue May 01 13:40:42 2012 -0400
+++ b/src/mem/cache/cache.hh	Wed May 02 16:07:20 2012 -0400
@@ -370,6 +370,15 @@
      * Find next request ready time from among possible sources.
      */
     Tick nextMSHRReadyTime();
+
+    /** serialize the state of the caches
+     * We currently don't support checkpointing cache state, so this panics.
+     */
+    virtual void serialize(std::ostream &os)
+    {
+        panic("Checkpointing of cache state is unimplemented\n");
+    }
+
 };
 
 #endif // __CACHE_HH__