linux-kernel - Re: [PATCH] staging: erofs: Fix a unused variable 'arg' warning

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Message-ID: <5BA1BF8A.1000807@huawei.com>
Date:   Wed, 19 Sep 2018 11:16:26 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     cgxu519 <cgxu519@....com>
CC:     <gregkh@...uxfoundation.org>, <gaoxiang25@...wei.com>,
        <yuchao0@...wei.com>, <linux-erofs@...ts.ozlabs.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] staging: erofs: Fix a unused variable 'arg' warning

On 2018/9/19 11:07, cgxu519 wrote:
> On 09/19/2018 10:16 AM, zhong jiang wrote:
>> I find the following warning when compiling the kernel.
>>
>> drivers/staging/erofs/super.c:195:6: warning: unused variable 'arg' [-Wunused-variable]
>>    int arg = 0;
>>
>> Signed-off-by: zhong jiang <zhongjiang@...wei.com>
>> ---
>>   drivers/staging/erofs/super.c | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/drivers/staging/erofs/super.c b/drivers/staging/erofs/super.c
>> index 6423592..c04313f 100644
>> --- a/drivers/staging/erofs/super.c
>> +++ b/drivers/staging/erofs/super.c
>> @@ -192,7 +192,9 @@ static int parse_options(struct super_block *sb, char *options)
>>   {
>>       substring_t args[MAX_OPT_ARGS];
>>       char *p;
>> +#ifdef CONFIG_EROFS_FAULT_INJECTION
>>       int arg = 0;
>> +#endif
>>         if (!options)
>>           return 0;
>
> Hi,
>
> The fix has already included in my patch series "staging: erofs: option validation for remount and some code cleanups",
> so it will be fixed when the series merge into tree and we do not encourage surrounding the code with macro in option
> parsing for this case.
>
Fine.  Thank you for explaination.

Sincerely,
zhong jiang
> Thanks,
> Chengguang
>
> .
>