linux-kernel - Re: [PATCH 4/4] scripts/cvt_style.pl: Tool to reformat sources in various ways

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Date:   Sat, 05 Oct 2019 23:35:42 -0700
From:   Joe Perches <joe@...ches.com>
To:     Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Kees Cook <keescook@...omium.org>,
        Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Pavel Machek <pavel@....cz>,
        "Gustavo A . R . Silva" <gustavo@...eddedor.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Shawn Landden <shawn@....icu>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        Nathan Chancellor <natechancellor@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Miller <davem@...emloft.net>,
        clang-built-linux <clang-built-linux@...glegroups.com>
Subject: Re: [PATCH 4/4] scripts/cvt_style.pl: Tool to reformat sources in
 various ways

On Sat, 2019-10-05 at 19:31 +0200, Miguel Ojeda wrote:
> Hi Joe,

Hello.

> On Sat, Oct 5, 2019 at 6:47 PM Joe Perches <joe@...ches.com> wrote:
[]
> > As for the commit itself: while I am sure this tool is very useful
> (and certainly you put a *lot* of effort into this tool), I don't see
> how it is related to the fallthrough remapping (at least the
> non-fallthrough parts).

It's not particularly related.

It's a 10 year old script that I just extended because it's
convenient for me.

I think I first posted it in 2011, but I started it as a
complement to checkpatch in 2010.

https://lwn.net/Articles/380161/

Doing the regexes for the fallthrough conversions took me
a couple hours.

> Also, we should consider whether we want more tools like this now or
> simply put the efforts into moving to clang-format.

I think clang-format could not do this sort of conversion.
Nor could coccinelle or checkpatch.

Anyway, it's not really necessary for this particular patch
to be applied, but it's a convenient way to show the script
has the capability to do fallthrough comment conversions.

I think it does conversions fairly reasonably but likely
some files could not compile without adding an #include
like:

#include <linux/compiler.h>