linux-kernel - Re: [PATCH 09/10] kernel/sysctl.c: Replace 1 and 0 by corresponding boolean value

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Message-ID: <202003281423.E2DA6482@keescook>
Date:   Sat, 28 Mar 2020 14:24:46 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     julia.lawall@...6.fr, boqun.feng@...il.com,
        Jules Irenge <jbi.octave@...il.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Iurii Zaikin <yzaikin@...gle.com>,
        "open list:PROC SYSCTL" <linux-kernel@...r.kernel.org>,
        "open list:PROC SYSCTL" <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH 09/10] kernel/sysctl.c: Replace 1 and 0 by corresponding
 boolean value

On Fri, Mar 27, 2020 at 09:23:56PM +0000, Jules Irenge wrote:
> Coccinelle reports a warning
> 
> WARNING: Assignment of 0/1 to bool variable
> 
> To fix this, values 1 and 0 of first variable
> are replaced by true and false respectively.
> Given that variable first is of bool type.
> This fixes the warnings.

Sure! Thanks. :)

> Signed-off-by: Jules Irenge <jbi.octave@...il.com>

Reviewed-by: Kees Cook <keescook@...omium.org>

-Kees

> ---
>  kernel/sysctl.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/kernel/sysctl.c b/kernel/sysctl.c
> index ad5b88a53c5a..4132a35e85bd 100644
> --- a/kernel/sysctl.c
> +++ b/kernel/sysctl.c
> @@ -3158,7 +3158,7 @@ int proc_do_large_bitmap(struct ctl_table *table, int write,
>  			 void __user *buffer, size_t *lenp, loff_t *ppos)
>  {
>  	int err = 0;
> -	bool first = 1;
> +	bool first = true;
>  	size_t left = *lenp;
>  	unsigned long bitmap_len = table->maxlen;
>  	unsigned long *bitmap = *(unsigned long **) table->data;
> @@ -3249,7 +3249,7 @@ int proc_do_large_bitmap(struct ctl_table *table, int write,
>  			}
>  
>  			bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1);
> -			first = 0;
> +			first = false;
>  			proc_skip_char(&p, &left, '\n');
>  		}
>  		kfree(kbuf);
> @@ -3281,7 +3281,7 @@ int proc_do_large_bitmap(struct ctl_table *table, int write,
>  					break;
>  			}
>  
> -			first = 0; bit_b++;
> +			first = false; bit_b++;
>  		}
>  		if (!err)
>  			err = proc_put_char(&buffer, &left, '\n');
> -- 
> 2.25.1
> 

-- 
Kees Cook