diff -Nurp -X linux-RT4/Documentation/dontdiff linux-RT4/include/linux/cpufreq.h linux-RT3/include/linux/cpufreq.h
--- linux-RT4/include/linux/cpufreq.h	2005-05-27 22:00:11.000000000 +0200
+++ linux-RT3/include/linux/cpufreq.h	2005-05-27 21:54:52.000000000 +0200
@@ -81,7 +81,7 @@ struct cpufreq_policy {
         unsigned int		policy; /* see above */
 	struct cpufreq_governor	*governor; /* see below */
 
- 	struct semaphore	lock;   /* CPU ->setpolicy or ->target may
+ 	struct compat_semaphore	lock;   /* CPU ->setpolicy or ->target may
 					   only be called once a time */
 
 	struct work_struct	update; /* if update_policy() needs to be