#include <linux/spinlock.h>
#include <linux/types.h>
-# ifdef HAVE_RCU
-# include <linux/rcupdate.h> /* for rcu_head{} */
+#include <linux/rcupdate.h> /* for rcu_head{} */
typedef struct rcu_head cfs_rcu_head_t;
-# endif
#endif /* ifdef __KERNEL__ */