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.
Regards,
Tim Chen
On Tue, 2006-07-11 at 09:13 +0200, Arjan van de Ven wrote:
> On Mon, 2006-07-10 at 17:18 -0700, Tim Chen wrote:
> > When CONFIG_TRACE_IRQFLAGS_SUPPORT is turned off, the latest kernel has
> > compile errors. The patch below fix the problems.
>
>
> Hi,
>
> which architecture did you see this on? (asking because IA64 and PPC
> compile just fine without this, and for x86 and x86-64 this is not an
> option you can turn off as user, it's not a user selectable config
> option but it's a "I have this feature in arch" option)
>
> Greetings,
> Arjan van de Ven
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