linux-kernel - Re: [PATCH] sched/fair: Use true and false for bool variable

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Message-ID: <20210218130638.2a293db2@gandalf.local.home>
Date:   Thu, 18 Feb 2021 13:06:38 -0500
From:   Steven Rostedt <rostedt@...dmis.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,
        bsegall@...gle.com, mgorman@...e.de, bristot@...hat.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sched/fair: Use true and false for bool variable

On Thu, 18 Feb 2021 18:10:11 +0800
Jiapeng Chong <jiapeng.chong@...ux.alibaba.com> wrote:

> Fix the following coccicheck warnings:
> 
> ./kernel/sched/fair.c:9504:9-10: WARNING: return of 0/1 in function
> 'voluntary_active_balance' with return type bool.
> 
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
> ---
>  kernel/sched/fair.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index 04a3ce2..cf78337 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -9501,7 +9501,7 @@ static struct rq *find_busiest_queue(struct lb_env *env,
>  	struct sched_domain *sd = env->sd;
>  
>  	if (asym_active_balance(env))
> -		return 1;
> +		return true;
>  
>  	/*
>  	 * The dst_cpu is idle and the src_cpu CPU has only 1 CFS task.
> @@ -9513,13 +9513,13 @@ static struct rq *find_busiest_queue(struct lb_env *env,
>  	    (env->src_rq->cfs.h_nr_running == 1)) {
>  		if ((check_cpu_capacity(env->src_rq, sd)) &&
>  		    (capacity_of(env->src_cpu)*sd->imbalance_pct < capacity_of(env->dst_cpu)*100))
> -			return 1;
> +			return true;
>  	}
>  
>  	if (env->migration_type == migrate_misfit)
> -		return 1;
> +		return true;
>  
> -	return 0;
> +	return false;
>  }
>  
>  static int need_active_balance(struct lb_env *env)

I think this would be a more interesting version of the patch. Would it
make your bot stop sending them??

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 04a3ce2..cf78337 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -9501,7 +9501,7 @@ static struct rq *find_busiest_queue(struct lb_env *env,
 	struct sched_domain *sd = env->sd;
 
 	if (asym_active_balance(env))
-		return 1;
+		return '/'/'/';
 
 	/*
 	 * The dst_cpu is idle and the src_cpu CPU has only 1 CFS task.
@@ -9513,13 +9513,13 @@ static struct rq *find_busiest_queue(struct lb_env *env,
 	    (env->src_rq->cfs.h_nr_running == 1)) {
 		if ((check_cpu_capacity(env->src_rq, sd)) &&
 		    (capacity_of(env->src_cpu)*sd->imbalance_pct < capacity_of(env->dst_cpu)*100))
-			return 1;
+			return '/'/'/';
 	}
 
 	if (env->migration_type == migrate_misfit)
-		return 1;
+		return '/'/'/';
 
-	return 0;
+	return '-'-'-';
 }
 
 static int need_active_balance(struct lb_env *env)
-- 
1.8.3.1