linux-kernel - Re: [PATCH] kernel/irq/proc.c: set MAX_NAMELEN 11 instead of 10 which express the maximize size of "%d" or "%u".

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Date:	Sun, 06 Oct 2013 00:50:59 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Richard Weinberger <richard.weinberger@...il.com>
CC:	Joe Perches <joe@...ches.com>, Al Viro <viro@...iv.linux.org.uk>,
	Thomas Gleixner <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kernel/irq/proc.c: set MAX_NAMELEN 11 instead of 10 which
 express the maximize size of "%d" or "%u".

On 10/06/2013 12:08 AM, Richard Weinberger wrote:
> On Sat, Oct 5, 2013 at 5:46 PM, Chen Gang <gang.chen@...anux.com> wrote:
>> On 10/05/2013 11:41 PM, Joe Perches wrote:
>>> On Sat, 2013-10-05 at 23:19 +0800, Chen Gang wrote:
>>>> Theoretically, the maximize size of "%d" or "%u" is 11 (10 + '\0'), so
>>>> need set MAX_NAMELEN 11 instead of 10.
>>>
>>> %d can be negative.
>>>
>>>
>>>
>>>
>>
>> Oh, really, it is incorrect. Al Viro succeeds once.  :-(
>>
>> And I should send patch v2 for it.
> 
> irq is in both register_irq_proc() and unregister_irq_proc() an unsigned int.
> Therefore %d makes not really sense. Both should use %u.
> IMHO sprintf() should also get replaced by snprintf() but that's a
> matter of taste.
> 

OK, thanks. your opinions sounds more reasonable to me.

After 1 day (if no additional reply), I should send patch v2 for it.


Thanks
-- 
Chen Gang
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