linux-kernel - [tip: locking/core] lockdep: Enable PROVE_RAW_LOCK_NESTING with PROVE

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Message-ID: <172963403080.1442.10119121567439415054.tip-bot2@tip-bot2>
Date: Tue, 22 Oct 2024 21:53:50 -0000
From: "tip-bot2 for Sebastian Andrzej Siewior" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
 Waiman Long <longman@...hat.com>, Boqun Feng <boqun.feng@...il.com>,
 x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: locking/core] lockdep: Enable PROVE_RAW_LOCK_NESTING with
 PROVE_LOCKING.

The following commit has been merged into the locking/core branch of tip:

Commit-ID:     560af5dc839eef08a273908f390cfefefb82aa04
Gitweb:        https://git.kernel.org/tip/560af5dc839eef08a273908f390cfefefb82aa04
Author:        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
AuthorDate:    Wed, 09 Oct 2024 17:45:03 +02:00
Committer:     Boqun Feng <boqun.feng@...il.com>
CommitterDate: Thu, 17 Oct 2024 21:21:16 -07:00

lockdep: Enable PROVE_RAW_LOCK_NESTING with PROVE_LOCKING.

With the printk issues solved, the last known splat created by
PROVE_RAW_LOCK_NESTING is gone.

Enable PROVE_RAW_LOCK_NESTING by default as part of PROVE_LOCKING. Keep
the defines around in case something serious pops up and it needs to be
disabled.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Acked-by: Waiman Long <longman@...hat.com>
Signed-off-by: Boqun Feng <boqun.feng@...il.com>
Link: https://lore.kernel.org/r/20241009161041.1018375-2-bigeasy@linutronix.de
---
 lib/Kconfig.debug | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 7315f64..5b67816 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1409,22 +1409,14 @@ config PROVE_LOCKING
 	 For more details, see Documentation/locking/lockdep-design.rst.

 config PROVE_RAW_LOCK_NESTING
-	bool "Enable raw_spinlock - spinlock nesting checks"
+	bool
 	depends on PROVE_LOCKING
-	default n
+	default y
 	help
 	 Enable the raw_spinlock vs. spinlock nesting checks which ensure
 	 that the lock nesting rules for PREEMPT_RT enabled kernels are
 	 not violated.

-	 NOTE: There are known nesting problems. So if you enable this
-	 option expect lockdep splats until these problems have been fully
-	 addressed which is work in progress. This config switch allows to
-	 identify and analyze these problems. It will be removed and the
-	 check permanently enabled once the main issues have been fixed.
-
-	 If unsure, select N.
-
 config LOCK_STAT
 	bool "Lock usage statistics"
 	depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT