linux-kernel - Re: [PATCH 6/8] cpumask: Optimize cpumask_of_cpu in lib/smp_processor

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Message-ID: <48811AFA.3060403@sgi.com>
Date:	Fri, 18 Jul 2008 15:36:42 -0700
From:	Mike Travis <travis@....com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Rusty Russell <rusty@...tcorp.com.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Jack Steiner <steiner@....com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/8] cpumask: Optimize cpumask_of_cpu in	lib/smp_processor_id.c

Ingo Molnar wrote:
> * Ingo Molnar <mingo@...e.hu> wrote:
> 
>> hmmm:
>>
>>> --- linux-2.6.tip.orig/lib/smp_processor_id.c
>>> +++ linux-2.6.tip/lib/smp_processor_id.c
>>>  	unsigned long preempt_count = preempt_count();
>>>  	int this_cpu = raw_smp_processor_id();
>>> -	cpumask_t this_mask;
>>> +	cpumask_of_cpu_ptr_declare(this_mask);
>>> -	this_mask = cpumask_of_cpu(this_cpu);
>>> +	cpumask_of_cpu_ptr_next(this_mask, cpu);
>> 'cpu' is not declared ...

Hmm is right...!  ;-)

Went through my logs and didn't see the file explicitly listed as
compiled but it still should have caught it.

Thanks for the fix!

> 
> commit 06f8d00e9eecb738c99b737ac38a585ea7583ad5
> Author: Ingo Molnar <mingo@...e.hu>
> Date:   Fri Jul 18 22:34:00 2008 +0200
> 
>     cpumask: Optimize cpumask_of_cpu in lib/smp_processor_id.c, fix
>     
>     fix typo.
>     
>     Signed-off-by: Ingo Molnar <mingo@...e.hu>
> ---
>  lib/smp_processor_id.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/lib/smp_processor_id.c b/lib/smp_processor_id.c
> index 9fb2df0..c4381d9 100644
> --- a/lib/smp_processor_id.c
> +++ b/lib/smp_processor_id.c
> @@ -23,7 +23,7 @@ notrace unsigned int debug_smp_processor_id(void)
>  	 * Kernel threads bound to a single CPU can safely use
>  	 * smp_processor_id():
>  	 */
> -	cpumask_of_cpu_ptr_next(this_mask, cpu);
> +	cpumask_of_cpu_ptr_next(this_mask, this_cpu);
>  
>  	if (cpus_equal(current->cpus_allowed, *this_mask))
>  		goto out;
> --
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