linux-kernel - Re: [PATCH] acpi: remove a meaningless null check before debugfs

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Date:   Thu, 6 Sep 2018 22:28:27 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     <rjw@...ysocki.net>, <lenb@...nel.org>,
        <linux-kernel@...r.kernel.org>, <linux-acpi@...r.kernel.org>,
        <jkosina@...e.cz>, <rafael.j.wysocki@...el.com>,
        <rusty@...tcorp.com.au>
Subject: Re: [PATCH] acpi: remove a meaningless null check before debugfs_remove

+to maintainers

On 2018/8/18 18:49, zhong jiang wrote:
> debugfs_remove has taken null pointer into account. So it is safe
> to remove the check before debugfs_remove.
>
> Signed-off-by: zhong jiang <zhongjiang@...wei.com>
> ---
>  drivers/acpi/custom_method.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/acpi/custom_method.c b/drivers/acpi/custom_method.c
> index e967c11..4451877 100644
> --- a/drivers/acpi/custom_method.c
> +++ b/drivers/acpi/custom_method.c
> @@ -92,8 +92,7 @@ static int __init acpi_custom_method_init(void)
>  
>  static void __exit acpi_custom_method_exit(void)
>  {
> -	if (cm_dentry)
> -		debugfs_remove(cm_dentry);
> +	debugfs_remove(cm_dentry);
>  }
>  
>  module_init(acpi_custom_method_init);