linux-hardening - Re: [PATCH -next 2/4] tun: Make use of str_disabled

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Message-ID: <5b1b6fbc-6135-47ae-af32-60ef71595666@huawei.com>
Date: Mon, 2 Sep 2024 09:27:51 +0800
From: Hongbo Li <lihongbo22@...wei.com>
To: Jakub Kicinski <kuba@...nel.org>
CC: <kees@...nel.org>, <andy@...nel.org>, <willemdebruijn.kernel@...il.com>,
	<jasowang@...hat.com>, <davem@...emloft.net>, <edumazet@...gle.com>,
	<pabeni@...hat.com>, <akpm@...ux-foundation.org>,
	<linux-hardening@...r.kernel.org>, <netdev@...r.kernel.org>,
	<linux-mm@...ck.org>
Subject: Re: [PATCH -next 2/4] tun: Make use of str_disabled_enabled helper



On 2024/9/1 4:07, Jakub Kicinski wrote:
> On Sat, 31 Aug 2024 17:58:38 +0800 Hongbo Li wrote:
>> Use str_disabled_enabled() helper instead of open
>> coding the same.
> 
>> diff --git a/drivers/net/tun.c b/drivers/net/tun.c
>> index 6fe5e8f7017c..29647704bda8 100644
>> --- a/drivers/net/tun.c
>> +++ b/drivers/net/tun.c
>> @@ -3178,7 +3178,7 @@ static long __tun_chr_ioctl(struct file *file, unsigned int cmd,
>>   
>>   		/* [unimplemented] */
>>   		netif_info(tun, drv, tun->dev, "ignored: set checksum %s\n",
>> -			   arg ? "disabled" : "enabled");
>> +			   str_disabled_enabled(arg));
> 
> You don't explain the 'why'. How is this an improvement?
> nack on this and 2 similar networking changes you sent
> 
This just give an example of using lib/string_choices' helper which 
prevents the function from being removed due to detection of non-use. 
These helpers are convenient. It's functionally equivalent, this avoids 
the dispersion of such writing styles( ? XXX : noXXX) everywhere.

Thanks,
Hongbo