*** postgresql-7.3.2/src/include/storage/buf_internals.h	Thu Sep  5 05:31:45 2002
--- /tmp/postgresql-7.3.2.tar/postgresql-7.3.2/src/include/storage/buf_internals.h	Tue Jun 17 13:09:24 2003
***************
*** 80,85 ****
--- 80,87 ----
  {
  	Buffer		freeNext;		/* links for freelist chain */
  	Buffer		freePrev;
+   int         freeState;       /* used for any buffer replacement strategy*/
+   
  	SHMEM_OFFSET data;			/* pointer to data in buf pool */
  
  	/* tag and id must be together for table lookup (still true?) */