linux-kernel - Re: [PATCH] libbpf: remove unneeded conversion to bool

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Date:   Fri, 26 Nov 2021 00:12:51 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     davidcomponentone@...il.com, ast@...nel.org,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org, Yang Guang <yang.guang5@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: Re: [PATCH] libbpf: remove unneeded conversion to bool

On 11/25/21 1:54 AM, davidcomponentone@...il.com wrote:
> From: Yang Guang <yang.guang5@....com.cn>
> 
> The coccinelle report
> ./tools/lib/bpf/libbpf.c:1644:43-48:
> WARNING: conversion to bool not needed here
> Relational and logical operators evaluate to bool,
> explicit conversion is overly verbose and unneeded.
> 
> Reported-by: Zeal Robot <zealci@....com.cn>
> Signed-off-by: Yang Guang <yang.guang5@....com.cn>

Nak, dup of: https://lore.kernel.org/bpf/CAEf4BzaADXguVoh0KXxGYhzG68eA1bqfKH1T1SWyPvkE5BHa5g@mail.gmail.com/

> ---
>   tools/lib/bpf/libbpf.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
> index 14a89dc99937..33eb365a0b7f 100644
> --- a/tools/lib/bpf/libbpf.c
> +++ b/tools/lib/bpf/libbpf.c
> @@ -1641,7 +1641,7 @@ static int set_kcfg_value_tri(struct extern_desc *ext, void *ext_val,
>   				ext->name, value);
>   			return -EINVAL;
>   		}
> -		*(bool *)ext_val = value == 'y' ? true : false;
> +		*(bool *)ext_val = value == 'y';
>   		break;
>   	case KCFG_TRISTATE:
>   		if (value == 'y')
>