linux-kernel - Re: [PATCH 1/5] sched, rt: move .switched_from out of the scope of CONFIG

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Date:	Sat, 28 Dec 2013 13:19:48 +0400
From:	Kirill Tkhai <tkhai@...dex.ru>
To:	Zhi Yong Wu <zwu.kernel@...il.com>
Cc:	mingo@...hat.com, peterz@...radead.org,
	linux-kernel@...r.kernel.org,
	Zhi Yong Wu <wuzhy@...ux.vnet.ibm.com>
Subject: Re: [PATCH 1/5] sched, rt: move .switched_from out of the scope of
 CONFIG_SMP

On Пт, дек 27, 2013 at 07:41:00 +0800, Zhi Yong Wu wrote:
> From: Zhi Yong Wu <wuzhy@...ux.vnet.ibm.com>
> 
> .switched_from shouldn't be initialized in the scope of CONFIG_SMP,
> so this patch is trying to move it out.
> 
> Signed-off-by: Zhi Yong Wu <wuzhy@...ux.vnet.ibm.com>
> ---
>  kernel/sched/rt.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
> index 1c40655..f34d41b 100644
> --- a/kernel/sched/rt.c
> +++ b/kernel/sched/rt.c
> @@ -2002,9 +2002,9 @@ const struct sched_class rt_sched_class = {
>  	.pre_schedule		= pre_schedule_rt,
>  	.post_schedule		= post_schedule_rt,
>  	.task_woken		= task_woken_rt,
> -	.switched_from		= switched_from_rt,
>  #endif
>  
> +	.switched_from		= switched_from_rt,
>  	.set_curr_task          = set_curr_task_rt,
>  	.task_tick		= task_tick_rt,

This will not be compilable in !SMP mode because the body of switched_from_rt()
is still under CONFIG_SMP define.

Kirill
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