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Subject: Re: [PATCH] irqtrace-option-off-compile-fix
From: Tim Chen <tim.c.chen@linux.intel.com>
Reply-To: tim.c.chen@linux.intel.com
To: Arjan van de Ven <arjan@infradead.org>
Cc: linux-kernel@vger.kernel.org, mingo@elte.hu, akpm@osdl.org
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Organization: Intel
Date: Tue, 11 Jul 2006 09:36:44 -0700
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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.