linux-kernel - [PATCH rcu 1/9] rcu: fix header guard for rcu_all

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Message-Id: <20250116201327.3782963-1-paulmck@kernel.org>
Date: Thu, 16 Jan 2025 12:13:19 -0800
From: "Paul E. McKenney" <paulmck@...nel.org>
To: rcu@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	kernel-team@...a.com,
	rostedt@...dmis.org,
	Ankur Arora <ankur.a.arora@...cle.com>,
	"Paul E . McKenney" <paulmck@...nel.org>,
	Frederic Weisbecker <frederic@...nel.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [PATCH rcu 1/9] rcu: fix header guard for rcu_all_qs()

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

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>
---
 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 27d86d9127817..aad586f15ed0c 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -103,7 +103,7 @@ extern int rcu_scheduler_active;
 void rcu_end_inkernel_boot(void);
 bool rcu_inkernel_boot_has_ended(void);
 bool rcu_is_watching(void);
-#ifndef CONFIG_PREEMPTION
+#ifndef CONFIG_PREEMPT_RCU
 void rcu_all_qs(void);
 #endif
 
-- 
2.40.1