[Linux-kernel-mentees] [PATCH] checkpatch: add fix for BAD_SIGN_OFF

Aditya yashsri421 at gmail.com
Sat Nov 7 09:27:24 UTC 2020

On 4/11/20 4:44 pm, Lukas Bulwahn wrote:
> On Tue, Nov 3, 2020 at 4:19 PM Aditya Srivastava <yashsri421 at gmail.com> wrote:
>> Currently, checkpatch warns us if the author of the commit signs-off
>> as co-developed-by.
>> E.g. for commit 6e88559470f5 ("Documentation: Add section about
>> CPU vulnerabilities for Spectre") we get:
>> WARNING: Co-developed-by: should not be used to attribute nominal
>> patch author 'Tim Chen <tim.c.chen at linux.intel.com>'
>> Co-developed-by: Tim Chen <tim.c.chen at linux.intel.com>
>> Provide a simple fix by removing the co-developed-by line from the
>> commit message
> Patch looks good. Maybe you can add a statistics on how many cases of
> the last 200,000 commits this rule would actually trigger?
> E.g., you can probably quickly filter all commits that have at least
> one Co-developed-by tag among those last 200,000 commits (that is
> already only a few thousands), then take that list and just check with
> checkpatch.pl for this one rule quickly to see how often the rule
> would even trigger at all.
> Once you have that and explain that in the commit message, I think the
> patch is ready for lkml and Joe Perches.
> Lukas

Hi Sir
I generated a report for around 200,000 commits (v4.13..v5.8), and
found that this rule was being triggered only 6 times. Statistically
this doesn't seem much. Is it still advisable to mention it in the
commit message?
Although, there's a possibility that user fixed this issue after
receiving the warning manually before committing.


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