rculist: use list_entry_rcu in places where it's appropriate

Use previously introduced list_entry_rcu instead of an open-coded
list_entry + rcu_dereference combination.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: dipankar@in.ibm.com
LKML-Reference: <20090414181715.GA3634@psychotron.englab.brq.redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

security/integrity/ima/ima_fs.c

@@ -84,8 +84,8 @@ static void *ima_measurements_next(struct seq_file *m, void *v, loff_t *pos)
 	 * against concurrent list-extension
 	 */
 	rcu_read_lock();
-	qe = list_entry(rcu_dereference(qe->later.next),
-			struct ima_queue_entry, later);
+	qe = list_entry_rcu(qe->later.next,
+			    struct ima_queue_entry, later);
 	rcu_read_unlock();
 	(*pos)++;