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Re: [PATCH] xfs: stop using simple_strtoul()

To: Jeff Liu <jeff.liu@xxxxxxxxxx>
Subject: Re: [PATCH] xfs: stop using simple_strtoul()
From: Abhijit Pawar <abhi.c.pawar@xxxxxxxxx>
Date: Wed, 09 Jan 2013 19:38:46 +0530
Cc: Abhijit Pawar <abhi.c.pawar@xxxxxxxxx>, Ben Myers <bpm@xxxxxxx>, xfs@xxxxxxxxxxx
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Hi Jeff, Ben,
On 01/09/2013 08:25 AM, Jeff Liu wrote:
> On 01/08/2013 11:15 PM, Abhijit Pawar wrote:
>> Hi Jeff,
>> On 01/08/2013 12:51 PM, Jeff Liu wrote:
>>> Hi Ben and Abhijit,
>>> On 01/08/2013 04:49 AM, Ben Myers wrote:
>>>> Hey Jeff & Abhijit,
>>>> On Sun, Jan 06, 2013 at 11:50:08AM +0800, Jeff Liu wrote:
>>>>> This small patch convert xfs_parseargs() and suffix_strtoul() to
>>>>> use kstrtoint() instead of simple_strtoul() which is deprecated.
>>>> It looks like Jeff's patch will conflict with a patch from Abhijit Pawar, 
>>>> 'fs:
>>>> remove obsolete simple_strto<foo>' which we saw Dec 7.  You guys went 
>>>> after the
>>>> same thing and came up with slightly differing results.  If Abhijit would
>>>> prefer to factor out the xfs changes I'd be happy to take either that, or
>>>> Jeff's patch, but it would be better if they didn't conflict.  Can y'all 
>>>> come
>>>> to an agreement as to what the xfs changes should be?
>>> Sorry, I missed that patch from Abhijit.
>>> Looks the previous patch did not replaced the simple_strtoul() with
>>> kstrtoint() in suffix_strtoul().
>>> Abhijit, would you like to fix it as well?
>> Yes,it did not replace the call. Looks like I have missed that piece of
>> code. Once Ben applies my original patch, I will send another patch for
>> this on top of that.
> Btw, on the original patch for XFS, you return a negative value per
> failure for all those changes in xfs_parseargs(),
> +                     rc = kstrtoint(value, 10, &dswidth);
> +                     if (rc)
> +                             return -EINVAL;
> However, it should be EINVAL because xfs_fs_fill_super() will end up
> convert it to be negative.
> FYI, if we make it to "return EINVAL", checkpatch.pl will show warning
> message.  That's why I didn't check up if kstrtoint() failed or not at
> this stage on my post, but just proceed to...and those values will be
> verified at the end of xfs_parseargs().
I have posted the patch with addition of the above comments.  The email
subject says, "[PATCH 1/1] fs/xfs remove obsolete simple_strto<foo>".

> Thanks,
> -Jeff


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