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locking/lockdep: Enforce PROVE_RAW_LOCK_NESTING only if ARCH_SUPPORTS_RT

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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 unimportant raw lock nesting issues
when they want to enable PROVE_LOCKING.  They do have the option
to enable it to look for these raw locking nesting problems if they
choose to.

Suggested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20241128020009.83347-1-longman@redhat.com
This commit is contained in:
Waiman Long 2024-11-27 21:00:09 -05:00 committed by Peter Zijlstra
parent 0302d2fd6e
commit d387ceb171
1 changed files with 2 additions and 2 deletions
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lib/Kconfig.debug
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@ -1397,9 +1397,9 @@ config PROVE_LOCKING
For more details, see Documentation/locking/lockdep-design.rst. For more details, see Documentation/locking/lockdep-design.rst.
config PROVE_RAW_LOCK_NESTING config PROVE_RAW_LOCK_NESTING
bool bool "Enable raw_spinlock - spinlock nesting checks" if !ARCH_SUPPORTS_RT
depends on PROVE_LOCKING depends on PROVE_LOCKING
default y default y if ARCH_SUPPORTS_RT
help help
Enable the raw_spinlock vs. spinlock nesting checks which ensure Enable the raw_spinlock vs. spinlock nesting checks which ensure
that the lock nesting rules for PREEMPT_RT enabled kernels are that the lock nesting rules for PREEMPT_RT enabled kernels are