linux-kernel - [PATCH AUTOSEL 5.4 71/79] rcu: fix header guard for rcu_all

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Message-Id: <20250505232151.2698893-71-sashal@kernel.org>
Date: Mon,  5 May 2025 19:21:43 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Ankur Arora <ankur.a.arora@...cle.com>,
	"Paul E . McKenney" <paulmck@...nel.org>,
	Frederic Weisbecker <frederic@...nel.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Boqun Feng <boqun.feng@...il.com>,
	Sasha Levin <sashal@...nel.org>,
	neeraj.upadhyay@...nel.org,
	joel@...lfernandes.org,
	josh@...htriplett.org,
	urezki@...il.com,
	rcu@...r.kernel.org
Subject: [PATCH AUTOSEL 5.4 71/79] rcu: fix header guard for rcu_all_qs()

From: Ankur Arora <ankur.a.arora@...cle.com>

[ Upstream commit ad6b5b73ff565e88aca7a7d1286788d80c97ba71 ]

rcu_all_qs() is defined for !CONFIG_PREEMPT_RCU but the declaration
is conditioned on CONFIG_PREEMPTION.

With CONFIG_PREEMPT_LAZY, CONFIG_PREEMPTION=y does not imply
CONFIG_PREEMPT_RCU=y.

Decouple the two.

Cc: Paul E. McKenney <paulmck@...nel.org>
Reviewed-by: Frederic Weisbecker <frederic@...nel.org>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Signed-off-by: Ankur Arora <ankur.a.arora@...cle.com>
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
Signed-off-by: Boqun Feng <boqun.feng@...il.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 include/linux/rcutree.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
index 18b1ed9864b02..5d39875c6594e 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -53,7 +53,7 @@ void rcu_scheduler_starting(void);
 extern int rcu_scheduler_active __read_mostly;
 void rcu_end_inkernel_boot(void);
 bool rcu_is_watching(void);
-#ifndef CONFIG_PREEMPTION
+#ifndef CONFIG_PREEMPT_RCU
 void rcu_all_qs(void);
 #endif
 
-- 
2.39.5