The patch titled
Subject: lockdep: make PROVE_RAW_LOCK_NESTING depend on PREEMPT_RT
has been added to the -mm mm-nonmm-unstable branch. Its filename is
lockdep-make-prove_raw_lock_nesting-depend-on-preempt_rt.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/lockdep-make-prove_raw_lock_nesting-depend-on-preempt_rt.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Chen Jun <chenjun102@xxxxxxxxxx>
Subject: lockdep: make PROVE_RAW_LOCK_NESTING depend on PREEMPT_RT
Date: Thu, 16 Jun 2022 02:29:11 +0000
CONFIG_PROVE_RAW_LOCK_NESTING is used to check two things.
1. calling spin_lock in hardirq.
2. raw_spinlock - spinlock nesting.
The error messages like below:
[ 13.485711] [ BUG: Invalid wait context ]
However there is no problem on non-PREEMPT_RT kernel. The messages may be
confusing and disturbing.
Therefore, do not check raw_spinlock - spinlock nesting
on non-PREEMPT_RT kernel.
Link: https://lkml.kernel.org/r/20220616022911.35826-1-chenjun102@xxxxxxxxxx
Signed-off-by: Chen Jun <chenjun102@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/Kconfig.debug | 1 +
1 file changed, 1 insertion(+)
--- a/lib/Kconfig.debug~lockdep-make-prove_raw_lock_nesting-depend-on-preempt_rt
+++ a/lib/Kconfig.debug
@@ -1270,6 +1270,7 @@ config PROVE_LOCKING
config PROVE_RAW_LOCK_NESTING
bool "Enable raw_spinlock - spinlock nesting checks"
depends on PROVE_LOCKING
+ depends on PREEMPT_RT
default n
help
Enable the raw_spinlock vs. spinlock nesting checks which ensure
_
Patches currently in -mm which might be from chenjun102@xxxxxxxxxx are
lockdep-make-prove_raw_lock_nesting-depend-on-preempt_rt.patch
