linux-kernel - Re: [PATCH 1/2]drivers/usb/core/sysfs.c Fix variable 'retval' set but not used

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Date:	Tue, 03 Aug 2010 09:12:42 -0700
From:	"Justin P. Mattock" <justinmattock@...il.com>
To:	Alan Stern <stern@...land.harvard.edu>
CC:	Valdis.Kletnieks@...edu, linux-usb@...r.kernel.org,
	dbrownell@...rs.sourceforge.net, gregkh@...e.de,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2]drivers/usb/core/sysfs.c Fix variable 'retval' set
 but not used

On 08/03/2010 08:36 AM, Alan Stern wrote:
> On Tue, 3 Aug 2010, Justin P. Mattock wrote:
>
>> On 08/03/2010 07:29 AM, Alan Stern wrote:
>>> On Tue, 3 Aug 2010 Valdis.Kletnieks@...edu wrote:
>>>
>>>> On Mon, 02 Aug 2010 21:26:28 PDT, "Justin P. Mattock" said:
>>>>> diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
>>>>
>>>>>    	if (alt->string)
>>>>> -		retval = device_create_file(&intf->dev,&dev_attr_interface);
>>>>> +		device_create_file(&intf->dev,&dev_attr_interface);
>>>>>    	intf->sysfs_files_created = 1;
>>>>>    	return 0;
>>>
>>> Justin, did you try compiling your new code?  Those unused values are
>>> there because device_create_file is declared as __must_check.
>>>
>>
>> I went as far as compiling, once I saw no warning then figured o.k
>> I'll send out what I have for feedback then go from there.
>> (and just for the record I want to thank those who took the time to go
>> through and give feedback).
>
> It's a little surprising that you didn't get any warning.  I guess you
> don't have CONFIG_ENABLE_MUST_CHECK turned on.
>
> Alan Stern
>
>


no nothing.. just the original warning.. as for MUST_CHECK
yeah your right it's off.

Justin P. Mattock
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