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From:   paulmck@kernel.org
To:     rcu@vger.kernel.org
Cc:     linux-kernel@vger.kernel.org, kernel-team@fb.com, mingo@kernel.org,
        jiangshanlai@gmail.com, dipankar@in.ibm.com,
        akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
        josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org,
        rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com,
        fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org,
        "Paul E. McKenney" <paulmck@kernel.org>
Subject: [PATCH RFC tip/core/rcu 07/16] rcutorture: Add a test for synchronize_rcu_mult()
Date:   Thu, 12 Mar 2020 11:16:53 -0700
Message-Id: <20200312181702.8443-7-paulmck@kernel.org>
In-Reply-To: <20200312181618.GA21271@paulmck-ThinkPad-P72>
References: <20200312181618.GA21271@paulmck-ThinkPad-P72>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

From: "Paul E. McKenney" <paulmck@kernel.org>

This commit adds a crude test for synchronize_rcu_mult().  This is
currently a smoke test rather than a high-quality stress test.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
 kernel/rcu/rcutorture.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index f75d466..1880c5f 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -20,7 +20,7 @@
 #include <linux/err.h>
 #include <linux/spinlock.h>
 #include <linux/smp.h>
-#include <linux/rcupdate.h>
+#include <linux/rcupdate_wait.h>
 #include <linux/interrupt.h>
 #include <linux/sched/signal.h>
 #include <uapi/linux/sched/types.h>
@@ -666,6 +666,11 @@ static void rcu_tasks_torture_deferred_free(struct rcu_torture *p)
 	call_rcu_tasks(&p->rtort_rcu, rcu_torture_cb);
 }
 
+static void synchronize_rcu_mult_test(void)
+{
+	synchronize_rcu_mult(call_rcu_tasks, call_rcu);
+}
+
 static struct rcu_torture_ops tasks_ops = {
 	.ttype		= RCU_TASKS_FLAVOR,
 	.init		= rcu_sync_torture_init,
@@ -675,7 +680,7 @@ static struct rcu_torture_ops tasks_ops = {
 	.get_gp_seq	= rcu_no_completed,
 	.deferred_free	= rcu_tasks_torture_deferred_free,
 	.sync		= synchronize_rcu_tasks,
-	.exp_sync	= synchronize_rcu_tasks,
+	.exp_sync	= synchronize_rcu_mult_test,
 	.call		= call_rcu_tasks,
 	.cb_barrier	= rcu_barrier_tasks,
 	.fqs		= NULL,
-- 
2.9.5