Index: modules/book/book.install
===================================================================
RCS file: /cvs/drupal/drupal/modules/book/book.install,v
retrieving revision 1.20.2.1
diff -u -p -r1.20.2.1 book.install
--- modules/book/book.install	6 Jan 2009 15:46:36 -0000	1.20.2.1
+++ modules/book/book.install	13 Oct 2009 17:29:04 -0000
@@ -287,4 +287,22 @@ function book_schema() {
   return $schema;
 }
 
+/**
+ * @defgroup updates-6.x-extra Extra book updates for 6.x
+ * @{
+ */
 
+/**
+ * Fix cache parameter for block.
+ */
+function book_update_6001() {
+  $ret = array();
+  $cache = BLOCK_CACHE_PER_PAGE | BLOCK_CACHE_PER_ROLE;
+  $ret[] = update_sql("UPDATE {blocks} SET cache = $cache WHERE module = 'book'");
+  return $ret;
+}
+
+/**
+ * @} End of "defgroup updates-6.x-extra"
+ * The next series of updates should start at 7000.
+ */