From: Neeraj Upadhyay <neeraju@codeaurora.org>
To: paulmck@kernel.org, josh@joshtriplett.org, rostedt@goodmis.org,
mathieu.desnoyers@efficios.com, jiangshanlai@gmail.com,
joel@joelfernandes.org
Cc: rcu@vger.kernel.org, linux-kernel@vger.kernel.org,
urezki@gmail.com, frederic@kernel.org,
Neeraj Upadhyay <neeraju@codeaurora.org>
Subject: [PATCH] rcu: update: Check rcu_bh_lock_map state in rcu_read_lock_bh_held
Date: Tue, 22 Jun 2021 17:35:21 +0530 [thread overview]
Message-ID: <1624363521-19702-1-git-send-email-neeraju@codeaurora.org> (raw)
In addition to irq and softirq state, check rcu_bh_lock_map
state, to decide whether RCU bh lock is held.
Signed-off-by: Neeraj Upadhyay <neeraju@codeaurora.org>
---
kernel/rcu/update.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c
index c21b38c..d416f1c 100644
--- a/kernel/rcu/update.c
+++ b/kernel/rcu/update.c
@@ -333,7 +333,7 @@ int rcu_read_lock_bh_held(void)
if (rcu_read_lock_held_common(&ret))
return ret;
- return in_softirq() || irqs_disabled();
+ return lock_is_held(&rcu_bh_lock_map) || in_softirq() || irqs_disabled();
}
EXPORT_SYMBOL_GPL(rcu_read_lock_bh_held);
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation
next reply other threads:[~2021-06-22 12:05 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-22 12:05 Neeraj Upadhyay [this message]
2021-06-22 17:58 ` [PATCH] rcu: update: Check rcu_bh_lock_map state in rcu_read_lock_bh_held Paul E. McKenney
2021-06-22 19:08 ` Neeraj Upadhyay
2021-06-22 23:46 ` Paul E. McKenney
2021-06-23 3:57 ` Neeraj Upadhyay
2021-06-23 15:39 ` Paul E. McKenney
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