linux-kernel - Re: [PATCH RFC v3 2/3] docs: add documentation for checkpatch

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Date:   Wed, 17 Feb 2021 21:16:08 +0530
From:   Dwaipayan Ray <dwaipayanray1@...il.com>
To:     Joe Perches <joe@...ches.com>
Cc:     Lukas Bulwahn <lukas.bulwahn@...il.com>,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH RFC v3 2/3] docs: add documentation for checkpatch

On Wed, Feb 17, 2021 at 4:07 PM Joe Perches <joe@...ches.com> wrote:
>
> On Tue, 2021-02-16 at 19:48 +0530, Dwaipayan Ray wrote:
> > On Sun, Feb 14, 2021 at 10:27 PM Joe Perches <joe@...ches.com> wrote:
> > > On Sat, 2021-02-13 at 18:45 +0530, Dwaipayan Ray wrote:
> > > > Add documentation for kernel script checkpatch.pl.
> > > > This documentation is also parsed by checkpatch to
> > > > enable a verbose mode.
> > > >
> > > > The message types in checkpatch are documented with rst
> > > > field lists. A total of 33 checkpatch type descriptions
> > > > are added.
> > >
> > > Alphabetic ordering isn't that great for these entries.
> > > Please group them by use:
> > >
> > > whitespace/code layout style:
> > > SPACING, TRAILING_WHITESPACE, LINE_SPACING
> []
> > Could I get some comment on this grouping for types:
> >
> > Allocation Style: ALLOC_ARRAY_ARGS, ALLOC_SIZEOF_STRUCT, ALLOC_WITH_MULTIPLY
> >
> > API Usage: ARCH_DEFINES, ARCH_INCLUDE_LINUX, ARRAY_SIZE, AVOID_BUG,
> >                     AVOID_EXTERNS, AVOID_L_PREFIX, BIT_MACRO, CONSIDER_KSTRTO
> >
> > Comment Style: BLOCK_COMMENT_STYLE, C99_COMMENTS
> >
> > Commit Message: BAD_SIGN_OFF, BAD_STABLE_ADDRESS_STYLE, COMMIT_COMMENT_SYMBOL,
> >                               COMMIT_MESSAGE, MISSING_SIGN_OFF,
> > NO_AUTHOR_SIGN_OFF
> >
> > Comparison Style: ASSIGN_IN_IF, BOOL_COMPARISON, COMPARISON_TO_NULL,
> >                                CONSTANT_COMPARISON
> >
> > Spacing & Brackets: ASSIGNMENT_CONTINUATIONS, BRACES, BRACKET_SPACE,
> >                                   CODE_INDENT, CONCATENATED_STRING,
> > LINE_SPACING,
> >                                   TRAILING_WHITESPACE
> >
> > Others: CAMELCASE, CONFIG_DESCRIPTION
> >
> > This is what I have done till now. Any suggestions would be nice and if it looks
> > okay I would like to send the v4 in.
>
> Looks OK.
>
> Please make sure you at least include SPACING in the spacing & brackets
> descriptions.
>
> It also seems like ref links to Documentation/process/coding-style.rst
> <section> (3.1 in the SPACING case) should be used more frequently.
>
> It'd be 'nice' to somehow use sortable tables with some grouping
> attribute for these groups, but I have no idea if that's feasible with
> .rst restrutured text files.
>

I too didn't find anything like that. Seems like static tables are the most
that's feasible with sphynx. But here it might not look well.

> Perhaps simplify the checkpatch code a bit for the --terse and --verbose
> output.
>
> Maybe something like:
> ---
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index 869d80397f9f..07566cb3b3f8 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
>
> @@ -292,15 +292,16 @@ GetOptions(
>
>  help(0) if ($help);
>
> +die "$P: --git cannot be used with --file or --fix\n" if ($git && ($file || $fix));
> +die "$P: --verbose canot be used with --terse\n" if ($verbose && $terse);
> +
>  list_types(0) if ($list_types);
>

Sure will do this. Sending you the updated patch in a while.

Thanks!
--Dwaipayan