Index: defaults/special/Makefile.config
===================================================================
--- defaults/special/Makefile.config	(revision 59e9398b3988971c8517c1583fced494647f87ba)
+++ defaults/special/Makefile.config	(revision 29b81388f01a3adc660d263ca0e29a9bc35f2f0a)
@@ -29,4 +29,7 @@
 CONFIG_TEST = y
 
+# Kernel RCU implementation
+RCU = PREEMPT_A
+
 # Load disk drivers on startup
 CONFIG_START_BD = n