rcu: Add rcutorture test for call_srcu()

Add srcu_torture_deferred_free() for srcu_ops so as to test the new
call_srcu().  Rename the original srcu_ops to srcu_sync_ops.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

kernel/rcutorture.c

@@ -625,6 +625,11 @@ static int srcu_torture_completed(void)
 	return srcu_batches_completed(&srcu_ctl);
 }
 
+static void srcu_torture_deferred_free(struct rcu_torture *rp)
+{
+	call_srcu(&srcu_ctl, &rp->rtort_rcu, rcu_torture_cb);
+}
+
 static void srcu_torture_synchronize(void)
 {
 	synchronize_srcu(&srcu_ctl);
@@ -654,14 +659,29 @@ static struct rcu_torture_ops srcu_ops = {
 	.read_delay	= srcu_read_delay,
 	.readunlock	= srcu_torture_read_unlock,
 	.completed	= srcu_torture_completed,
-	.deferred_free	= rcu_sync_torture_deferred_free,
+	.deferred_free	= srcu_torture_deferred_free,
 	.sync		= srcu_torture_synchronize,
 	.call		= NULL,
 	.cb_barrier	= NULL,
 	.stats		= srcu_torture_stats,
 	.name		= "srcu"
 };
 
+static struct rcu_torture_ops srcu_sync_ops = {
+	.init		= srcu_torture_init,
+	.cleanup	= srcu_torture_cleanup,
+	.readlock	= srcu_torture_read_lock,
+	.read_delay	= srcu_read_delay,
+	.readunlock	= srcu_torture_read_unlock,
+	.completed	= srcu_torture_completed,
+	.deferred_free	= rcu_sync_torture_deferred_free,
+	.sync		= srcu_torture_synchronize,
+	.call		= NULL,
+	.cb_barrier	= NULL,
+	.stats		= srcu_torture_stats,
+	.name		= "srcu_sync"
+};
+
 static int srcu_torture_read_lock_raw(void) __acquires(&srcu_ctl)
 {
 	return srcu_read_lock_raw(&srcu_ctl);
@@ -679,14 +699,29 @@ static struct rcu_torture_ops srcu_raw_ops = {
 	.read_delay	= srcu_read_delay,
 	.readunlock	= srcu_torture_read_unlock_raw,
 	.completed	= srcu_torture_completed,
-	.deferred_free	= rcu_sync_torture_deferred_free,
+	.deferred_free	= srcu_torture_deferred_free,
 	.sync		= srcu_torture_synchronize,
 	.call		= NULL,
 	.cb_barrier	= NULL,
 	.stats		= srcu_torture_stats,
 	.name		= "srcu_raw"
 };
 
+static struct rcu_torture_ops srcu_raw_sync_ops = {
+	.init		= srcu_torture_init,
+	.cleanup	= srcu_torture_cleanup,
+	.readlock	= srcu_torture_read_lock_raw,
+	.read_delay	= srcu_read_delay,
+	.readunlock	= srcu_torture_read_unlock_raw,
+	.completed	= srcu_torture_completed,
+	.deferred_free	= rcu_sync_torture_deferred_free,
+	.sync		= srcu_torture_synchronize,
+	.call		= NULL,
+	.cb_barrier	= NULL,
+	.stats		= srcu_torture_stats,
+	.name		= "srcu_raw_sync"
+};
+
 static void srcu_torture_synchronize_expedited(void)
 {
 	synchronize_srcu_expedited(&srcu_ctl);
@@ -1685,7 +1720,7 @@ static int rcu_torture_barrier_init(void)
 	for (i = 0; i < n_barrier_cbs; i++) {
 		init_waitqueue_head(&barrier_cbs_wq[i]);
 		barrier_cbs_tasks[i] = kthread_run(rcu_torture_barrier_cbs,
-						   (void *)i,
+						   (void *)(long)i,
 						   "rcu_torture_barrier_cbs");
 		if (IS_ERR(barrier_cbs_tasks[i])) {
 			ret = PTR_ERR(barrier_cbs_tasks[i]);
@@ -1873,7 +1908,8 @@ rcu_torture_init(void)
 	static struct rcu_torture_ops *torture_ops[] =
 		{ &rcu_ops, &rcu_sync_ops, &rcu_expedited_ops,
 		  &rcu_bh_ops, &rcu_bh_sync_ops, &rcu_bh_expedited_ops,
-		  &srcu_ops, &srcu_raw_ops, &srcu_expedited_ops,
+		  &srcu_ops, &srcu_sync_ops, &srcu_raw_ops,
+		  &srcu_raw_sync_ops, &srcu_expedited_ops,
 		  &sched_ops, &sched_sync_ops, &sched_expedited_ops, };
 
 	mutex_lock(&fullstop_mutex);