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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: linux-kernel@vger.kernel.org
Cc: tglx@linutronix.de, Peter Zijlstra <peterz@infradead.org>,
	Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
	"Paul E. McKenney" <paulmck@kernel.org>,
	Josh Triplett <josh@joshtriplett.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	Lai Jiangshan <jiangshanlai@gmail.com>,
	Joel Fernandes <joel@joelfernandes.org>,
	rcu@vger.kernel.org
Subject: [PATCH 31/38] rcu: Replace deprecated CPU-hotplug functions.
Date: Tue,  3 Aug 2021 16:16:14 +0200	[thread overview]
Message-ID: <20210803141621.780504-32-bigeasy@linutronix.de> (raw)
In-Reply-To: <20210803141621.780504-1-bigeasy@linutronix.de>

The functions get_online_cpus() and put_online_cpus() have been
deprecated during the CPU hotplug rework. They map directly to
cpus_read_lock() and cpus_read_unlock().

Replace deprecated CPU-hotplug functions with the official version.
The behavior remains unchanged.

Cc: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: rcu@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
 kernel/rcu/tree.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 51f24ecd94b26..f116ce58f4e68 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -4050,7 +4050,7 @@ void rcu_barrier(void)
 	 */
 	init_completion(&rcu_state.barrier_completion);
 	atomic_set(&rcu_state.barrier_cpu_count, 2);
-	get_online_cpus();
+	cpus_read_lock();
 
 	/*
 	 * Force each CPU with callbacks to register a new callback.
@@ -4081,7 +4081,7 @@ void rcu_barrier(void)
 					  rcu_state.barrier_sequence);
 		}
 	}
-	put_online_cpus();
+	cpus_read_unlock();
 
 	/*
 	 * Now that we have an rcu_barrier_callback() callback on each
-- 
2.32.0


  reply	other threads:[~2021-08-03 14:17 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-03 14:15 [PATCH 00/38] Replace deprecated CPU-hotplug Sebastian Andrzej Siewior
2021-08-03 14:16 ` Sebastian Andrzej Siewior [this message]
2021-08-03 16:00   ` [PATCH 31/38] rcu: Replace deprecated CPU-hotplug functions Paul E. McKenney
2021-08-10 12:42     ` Thomas Gleixner
2021-08-10 18:20       ` Paul E. McKenney
2021-08-03 15:30 ` [PATCH 00/38] Replace deprecated CPU-hotplug Hans de Goede
2021-08-03 16:10   ` Sebastian Andrzej Siewior

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