rcutorture: Move mem_dump_obj() tests into separate function

To make the purpose of the code more apparent, this commit moves the
tests of mem_dump_obj() to a new rcu_torture_mem_dump_obj() function
and calls it from rcu_torture_cleanup().
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

kernel/rcu/rcutorture.c

@@ -1868,8 +1868,12 @@ rcu_torture_stats(void *arg)
 		torture_shutdown_absorb("rcu_torture_stats");
 	} while (!torture_must_stop());
 	torture_kthread_stopping("rcu_torture_stats");
+	return 0;
+}
 
-	{
+/* Test mem_dump_obj() and friends.  */
+static void rcu_torture_mem_dump_obj(void)
+{
 	struct rcu_head *rhp;
 	struct kmem_cache *kcp;
 	static int z;
@@ -1905,9 +1909,6 @@ rcu_torture_stats(void *arg)
 	pr_alert("mem_dump_obj(vmalloc %px):", &rhp->func);
 	mem_dump_obj(&rhp->func);
 	vfree(rhp);
-	}
-
-	return 0;
 }
 
 static void
@@ -2825,6 +2826,8 @@ rcu_torture_cleanup(void)
 	if (cur_ops->cleanup != NULL)
 		cur_ops->cleanup();
 
+	rcu_torture_mem_dump_obj();
+
 	rcu_torture_stats_print();  /* -After- the stats thread is stopped! */
 
 	if (err_segs_recorded) {