Linux Kernel: Checkpatch Documentation

Dwaipayan Ray dwaipayanray1 at gmail.com
Sun Aug 1 21:16:36 UTC 2021


On Sun, Aug 1, 2021 at 1:43 PM Anuj Pandey <anujpandey785 at gmail.com> wrote:
>
> I am interested in the Checkpatch Documentation mentorship program and I would like to work on the tasks for the mentee selection
>
> Thanks & Regards,
> Anuj Pandey

Thanks for your interest in working with the checkpatch documentation.

The zeroth task is to learn suitable netiquette for the communication with
the kernel community. Below are some basic rules and pointers for this
mentorship. More information on kernel netiquette is also at
https://people.kernel.org/tglx/notes-about-netiquette.

First, please do not top-post.

    A: Because we read from top to bottom, left to right.
    Q: Why should I start my reply below the quoted text?

    A: Because it messes up the order in which people normally read text.
    Q: Why is top-posting such a bad thing?

    A: The lost context.
    Q: What makes top-posted replies harder to read than bottom-posted?

    A: Yes.
    Q: Should I trim down the quoted part of an email to which I'm replying?

Second, please always CC: linux-kernel-mentees at lists.linuxfoundation.org.

Third, set up your email client according to the kernel community
rules. Here is some information to that:

https://www.kernel.org/doc/html/latest/process/submitting-patches.html#no-mime-no-links-no-compression-no-attachments-just-plain-text
https://www.kernel.org/doc/html/latest/process/email-clients.html

Generally more information on submitting patches and responding on
replies is at https://www.kernel.org/doc/html/latest/process/submitting-patches.html

Once the zeroth task is understood, you can now move on to the first
task: Running checkpatch on a specific file.

Get a clone of the Linux kernel repository.
The script checkpatch.pl is under the scripts directory.

Then, the first task is to run checkpatch.pl on a few files below
and share the results:

drivers/pinctrl/renesas/pinctrl.c
drivers/clk/tegra/clk-tegra124-emc.c

Which information on these rules that checkpatch warns about
is available in the Checkpatch Documentation?

If documentation of these rules is available, explain your
understanding of the rules in your own words.
If no information is available in the documentation,
explain your understanding of the rule.

In any case, explain the violation that is checked and raised in the
checkpatch script, i.e., what is implemented in checkpatch to check
the rule and possible violations. Which code in the checkpatch script
is raising the warning? What does it check and how is that
implemented?

Explain how to possibly fix this code with regards to that violation.

Once you succeed on this first task, we inform you about the further
second and third task. If you fail on any of those tasks, you are out
of the selection process.

The selection of the mentee will happen according to schedule,
at earliest on August 12th and at latest at the end of August.
More information is available at
https://docs.linuxfoundation.org/lfx/mentorship/mentorship-program-timelines.

All the best,
Dwaipayan.


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