[tip: locking/core] lockdep: Enable PROVE_RAW_LOCK_NESTING with PROVE_LOCKING.

tip-bot2 for Sebastian Andrzej Siewior
2024-10-22T21:53:53Z

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@linutronix.de>
AuthorDate: Wed, 09 Oct 2024 17:45:03 +02:00
Committer: Boqun Feng <boqun.feng@gmail.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@linutronix.de>
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.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