On 2020-07-06 22:50:04 [+0200], Peter Zijlstra wrote: > 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.
|$ git grep -C 2 PREEMPT_COUNT lib/Kconfig.debug |lib/Kconfig.debug-config DEBUG_ATOMIC_SLEEP |lib/Kconfig.debug- bool "Sleep inside atomic section checking" |lib/Kconfig.debug: select PREEMPT_COUNT |lib/Kconfig.debug- depends on DEBUG_KERNEL |lib/Kconfig.debug- depends on !ARCH_NO_PREEMPT There will be a build fault if you force preempt_count. Sebastian
