Re: [PATCH] irqtrace-option-off-compile-fix

[Tim Chen <tim.c.chen@linux.intel.com>]

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