diff --git a/actionpack/lib/action_controller/caching.rb b/actionpack/lib/action_controller/caching.rb
index b3fa129929a56da49368ad60b15df781d8974550..0da0ca18931522e93b822c1373524c1165ab4bb1 100644
--- a/actionpack/lib/action_controller/caching.rb
+++ b/actionpack/lib/action_controller/caching.rb
@@ -63,8 +63,9 @@ def cache_configured?
     included do
       extend ConfigMethods
 
-      @@perform_caching = true
-      cattr_accessor :perform_caching
+      delegate :perform_caching, :perform_caching=, :to => :config
+      singleton_class.delegate :perform_caching, :perform_caching=, :to => :config
+      self.perform_caching = true
     end
 
 
diff --git a/actionpack/lib/action_dispatch/middleware/params_parser.rb b/actionpack/lib/action_dispatch/middleware/params_parser.rb
index 1524b00d5bafeb5c7179022ce8b4173e9fbec1ff..09fb1f998a85d4b3bcbc01d49373d9a68b114f7d 100644
--- a/actionpack/lib/action_dispatch/middleware/params_parser.rb
+++ b/actionpack/lib/action_dispatch/middleware/params_parser.rb
@@ -1,3 +1,4 @@
+require 'active_support/core_ext/hash/conversions.rb'
 require 'action_dispatch/http/request'
 
 module ActionDispatch
diff --git a/actionpack/lib/action_view/helpers/cache_helper.rb b/actionpack/lib/action_view/helpers/cache_helper.rb
index 9c6fc752e5ceda672cf5340b696476353d66bf6c..a904af56bba7631644b2d21c461c9b7abadfdbfe 100644
--- a/actionpack/lib/action_view/helpers/cache_helper.rb
+++ b/actionpack/lib/action_view/helpers/cache_helper.rb
@@ -39,7 +39,7 @@ def cache(name = {}, options = nil, &block)
     private
       # TODO: Create an object that has caching read/write on it
       def fragment_for(name = {}, options = nil, &block) #:nodoc:
-        if controller.class.perform_caching
+        if controller.perform_caching
           if controller.fragment_exist?(name, options)
             controller.read_fragment(name, options)
           else
diff --git a/activerecord/test/cases/xml_serialization_test.rb b/activerecord/test/cases/xml_serialization_test.rb
index f5a18827d883c8f8bbcd7d18ba782434a2045e81..b1c75ec8cdfa333c61091cdba6684f99433bd6e0 100644
--- a/activerecord/test/cases/xml_serialization_test.rb
+++ b/activerecord/test/cases/xml_serialization_test.rb
@@ -4,6 +4,7 @@
 require 'models/author'
 require 'models/tagging'
 require 'models/comment'
+require 'models/company_in_module'
 
 class XmlSerializationTest < ActiveRecord::TestCase
   def test_should_serialize_default_root
diff --git a/activesupport/lib/active_support/core_ext/benchmark.rb b/activesupport/lib/active_support/core_ext/benchmark.rb
index ae57b152e826eb9e891e734db6b646a9c61d60bc..2d110155a5126f6cb7e930675f3bf461231e7fbf 100644
--- a/activesupport/lib/active_support/core_ext/benchmark.rb
+++ b/activesupport/lib/active_support/core_ext/benchmark.rb
@@ -1,18 +1,6 @@
 require 'benchmark'
 
 class << Benchmark
-  # Earlier Ruby had a slower implementation.
-  if RUBY_VERSION < '1.8.7'
-    remove_method :realtime
-
-    def realtime
-      r0 = Time.now
-      yield
-      r1 = Time.now
-      r1.to_f - r0.to_f
-    end
-  end
-
   def ms
     1000 * realtime { yield }
   end