linux-kernel - Re: [PATCH -rt] wrong usage of smp_processor

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Message-Id: <1178224391.7997.3.camel@imap.mvista.com>
Date:	Thu, 03 May 2007 13:33:11 -0700
From:	Daniel Walker <dwalker@...sta.com>
To:	Steven Rostedt <srostedt@...hat.com>
Cc:	mingo@...e.hu, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -rt] wrong usage of smp_processor_id()

On Thu, 2007-05-03 at 16:31 -0400, Steven Rostedt wrote:
> Daniel Walker wrote:
> 
> >>> Index: linux-2.6.21/kernel/latency_trace.c
> >>> ===================================================================
> >>> --- linux-2.6.21.orig/kernel/latency_trace.c
> >>> +++ linux-2.6.21/kernel/latency_trace.c
> >>> @@ -105,7 +105,7 @@ static inline int DEBUG_WARN_ON(int cond
> >>>  #ifdef CONFIG_CRITICAL_IRQSOFF_TIMING
> >>>  # ifdef CONFIG_CRITICAL_PREEMPT_TIMING
> >>>     static DEFINE_PER_CPU(int, trace_cpu_idle);
> >>> -#  define irqs_off_preempt_count() (!__get_cpu_var(trace_cpu_idle) && preempt_count())
> >>> +#  define irqs_off_preempt_count() (preempt_count() && !__get_cpu_var(trace_cpu_idle))
> >>>  # else
> >>>  #  define irqs_off_preempt_count() 0
> >>>  # endif
> 
> 
> > Isn't it a generic problem? It doesn't look specific to your change
> > unless you made some changes to entry.S .
> > 
> 
> See: http://lkml.org/lkml/2007/4/23/183
> 


Ahh, well safe bet I think.

Daniel

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