linux-kernel - Re: [PATCH] Fix inc_rt_tasks() to not declare variable 'rq' if it's notneeded

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Date:	Fri, 11 Jul 2008 07:04:33 -0600
From:	"Gregory Haskins" <ghaskins@...ell.com>
To:	<mingo@...e.hu>, <akpm@...ux-foundation.org>,
	"David Howells" <dhowells@...hat.com>
Cc:	<tglx@...utronix.de>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Fix inc_rt_tasks() to not declare variable 'rq' if
	it's notneeded

>>> On Fri, Jul 11, 2008 at  8:34 AM, in message
<20080711123454.10475.33099.stgit@...thog.procyon.org.uk>, David Howells
<dhowells@...hat.com> wrote: 
> Fix inc_rt_tasks() to not declare variable 'rq' if it's not needed.  It is
> declared if CONFIG_SMP or CONFIG_RT_GROUP_SCHED, but only used if 
> CONFIG_SMP.
> 
> This is a consequence of patch 1f11eb6a8bc92536d9e93ead48fa3ffbd1478571 plus
> patch 1100ac91b6af02d8639d518fad5b434b1bf44ed6.
> 
> Signed-off-by: David Howells <dhowells@...hat.com>

Acked by: Gregory Haskins <ghaskins@...ell.com>

> ---
> 
>  kernel/sched_rt.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> 
> diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
> index acba8eb..ec19ce5 100644
> --- a/kernel/sched_rt.c
> +++ b/kernel/sched_rt.c
> @@ -505,7 +505,9 @@ void inc_rt_tasks(struct sched_rt_entity *rt_se, struct 
> rt_rq *rt_rq)
>  	rt_rq->rt_nr_running++;
>  #if defined CONFIG_SMP || defined CONFIG_RT_GROUP_SCHED
>  	if (rt_se_prio(rt_se) < rt_rq->highest_prio) {
> +#ifdef CONFIG_SMP
>  		struct rq *rq = rq_of_rt_rq(rt_rq);
> +#endif
>  
>  		rt_rq->highest_prio = rt_se_prio(rt_se);
>  #ifdef CONFIG_SMP



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