linux-kernel - Re: [PATCH] sched: replace if (cond) BUG() with BUG

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Date:   Wed, 17 Mar 2021 09:39:47 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
Cc:     mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        bristot@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sched: replace if (cond) BUG() with BUG_ON()


* Jiapeng Chong <jiapeng.chong@...ux.alibaba.com> wrote:

> Fix the following coccicheck warnings:
> 
> ./kernel/sched/core.c:8039:2-5: WARNING: Use BUG_ON instead of if
> condition followed by BUG.
> 
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
> ---
>  kernel/sched/core.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> index 9819121..7392bc0 100644
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -8035,8 +8035,7 @@ void __init sched_init_smp(void)
>  	mutex_unlock(&sched_domains_mutex);
>  
>  	/* Move init over to a non-isolated CPU */
> -	if (set_cpus_allowed_ptr(current, housekeeping_cpumask(HK_FLAG_DOMAIN)) < 0)
> -		BUG();
> +	BUG(set_cpus_allowed_ptr(current, housekeeping_cpumask(HK_FLAG_DOMAIN)) < 0);

The patch doesn't quite do what the title & changelog claims...

Thanks,

	Ingo