On Tue, 2006-07-11 at 09:36 -0700, Tim Chen wrote:
> On Tue, 2006-07-11 at 19:13 +0200, Arjan van de Ven wrote:
> > On Tue, 2006-07-11 at 09:23 -0700, Tim Chen wrote:
> > > I was testing on x86_64 and turned off the option in
> > > arch/x86_64/Kconfig.debug.
> > >
> > > When the option is turned off, the following functions become undefined:
> > > local_irq_disable()
> > > local_irq_enable()
> > > local_irq_save(flags)
> > > local_irq_restore(flags)
> > > safe_halt()
> > > local_save_flags()
> > > irqs_disabled()
> > > irqs_disabled_flags(flags)
> > >
> > > It seems plausible that some users may want to avoid the overhead of
> > > tracing IRQFLAGS by turning the option off.
> >
> > eh that is a different config option!
>
> My typo, it is TRACE_IRQFLAGS_SUPPORT in arch/x86_64/Kconfig.debug.
that should never ever be user setable. That just says if you have
support for the api.
The one you want is CONFIG_TRACE_IRQFLAGS .. which is the one that
actually turns the tracing on
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