Re: [PATCH v3 04/20] lockdep: Add preemption enabled/disabled assertion APIs

Peter Zijlstra
2020-07-06T20:50:46Z

On Tue, Jun 30, 2020 at 07:44:36AM +0200, Ahmed S. Darwish wrote:
> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index d74ac0fd6b2d..e5e2e632b749 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -1118,6 +1118,7 @@ config PROVE_LOCKING
> select DEBUG_RWSEMS
> select DEBUG_WW_MUTEX_SLOWPATH
> select DEBUG_LOCK_ALLOC
> + select PREEMPT_COUNT if !ARCH_NO_PREEMPT
> select TRACE_IRQFLAGS
> default n
> help

I suspect this can be done unconditional, the thing that requires arch
support is CONFIG_PREEMPTION.