linux-kernel - [PATCH] locking/lockdep: Enforce PROVE_RAW_LOCK_NESTING only if ARCH_SUPPORTS

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Message-ID: <20241126231154.29151-1-longman@redhat.com>
Date: Tue, 26 Nov 2024 18:11:54 -0500
From: Waiman Long <longman@...hat.com>
To: Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Will Deacon <will.deacon@....com>,
	Boqun Feng <boqun.feng@...il.com>
Cc: linux-kernel@...r.kernel.org,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Guenter Roeck <linux@...ck-us.net>,
	Waiman Long <longman@...hat.com>
Subject: [PATCH] locking/lockdep: Enforce PROVE_RAW_LOCK_NESTING only if ARCH_SUPPORTS_RT

Relax the rule to set PROVE_RAW_LOCK_NESTING by default only for arches
that supports PREEMPT_RT.  For arches that do not support PREEMPT_RT,
they will not be forced to address irrelevant raw lock nesting issues
when they want to enable PROVE_LOCKING.

Signed-off-by: Waiman Long <longman@...hat.com>
---
 lib/Kconfig.debug | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 1e37c62e8595..c53a498dc33f 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1398,7 +1398,7 @@ config PROVE_LOCKING
 
 config PROVE_RAW_LOCK_NESTING
 	bool
-	depends on PROVE_LOCKING
+	depends on PROVE_LOCKING && ARCH_SUPPORTS_RT
 	default y
 	help
 	 Enable the raw_spinlock vs. spinlock nesting checks which ensure
-- 
2.47.0