linux-kernel - [PATCH v2 15/35] rcu: fix header guard for rcu_all

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Message-Id: <20240528003521.979836-16-ankur.a.arora@oracle.com>
Date: Mon, 27 May 2024 17:35:01 -0700
From: Ankur Arora <ankur.a.arora@...cle.com>
To: linux-kernel@...r.kernel.org
Cc: tglx@...utronix.de, peterz@...radead.org, torvalds@...ux-foundation.org,
        paulmck@...nel.org, rostedt@...dmis.org, mark.rutland@....com,
        juri.lelli@...hat.com, joel@...lfernandes.org, raghavendra.kt@....com,
        sshegde@...ux.ibm.com, boris.ostrovsky@...cle.com,
        konrad.wilk@...cle.com, Ankur Arora <ankur.a.arora@...cle.com>
Subject: [PATCH v2 15/35] rcu: fix header guard for rcu_all_qs()

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

With CONFIG_PREEMPT_AUTO, you can have configurations where
CONFIG_PREEMPTION is enabled without also enabling CONFIG_PREEMPT_RCU.

Decouple the two.

Cc: Paul E. McKenney <paulmck@...nel.org>
Signed-off-by: Ankur Arora <ankur.a.arora@...cle.com>

Changelog:
  Might be going away
---
 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 254244202ea9..be2b77c81a6d 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
 
-- 
2.31.1