* [PATCH 1/1] lockdep: make PROVE_RAW_LOCK_NESTING depend on PREEMPT_RT
@ 2022-06-16 2:29 Chen Jun
0 siblings, 0 replies; only message in thread
From: Chen Jun @ 2022-06-16 2:29 UTC (permalink / raw)
To: linux-kernel, akpm, peterz; +Cc: xuqiang36
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.
Signed-off-by: Chen Jun <chenjun102@huawei.com>
---
lib/Kconfig.debug | 1 +
1 file changed, 1 insertion(+)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index bd90664a2783..163d3a6606f3 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1227,6 +1227,7 @@ 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
--
2.17.1
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