linux-kernel - [PATCH] rcutorture: Use the barrier operation corresponding to rcutorture.torture

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Date:   Sun, 31 Jul 2022 18:53:56 +0800
From:   Zqiang <qiang1.zhang@...el.com>
To:     paulmck@...nel.org, frederic@...nel.org, quic_neeraju@...cinc.com
Cc:     rcu@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] rcutorture: Use the barrier operation corresponding to rcutorture.torture_type

when the rcutorture.torture_type value is 'rcu', this is correct for
invoke rcu_barrier() to wait all in-flight call_rcu() callbacks
(rcu_torture_fwd_cb_cr()) complete in rcutorture_oom_notify(). but when
the rcutorture.torture_type value is 'tasks-tracing', invoke rcu_barrier()
won't wait all in-flight call_rcu_tasks_trace() callbacks complete, the
rcu_barrier_tasks_trace() should be invoked.

This commit fix it by using barrier operation corresponding to
rcutorture.torture_type to wait all in-flight rcu_torture_fwd_cb_cr()
complete.

Signed-off-by: Zqiang <qiang1.zhang@...el.com>
---
 kernel/rcu/rcutorture.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 7f13f2e5ed62..7e7d54841613 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -2638,12 +2638,12 @@ static int rcutorture_oom_notify(struct notifier_block *self,
 	for (i = 0; i < fwd_progress; i++)
 		ncbs += rcu_torture_fwd_prog_cbfree(&rfp[i]);
 	pr_info("%s: Freed %lu RCU callbacks.\n", __func__, ncbs);
-	rcu_barrier();
+	cur_ops->cb_barrier();
 	ncbs = 0;
 	for (i = 0; i < fwd_progress; i++)
 		ncbs += rcu_torture_fwd_prog_cbfree(&rfp[i]);
 	pr_info("%s: Freed %lu RCU callbacks.\n", __func__, ncbs);
-	rcu_barrier();
+	cur_ops->cb_barrier();
 	ncbs = 0;
 	for (i = 0; i < fwd_progress; i++)
 		ncbs += rcu_torture_fwd_prog_cbfree(&rfp[i]);
-- 
2.25.1