linux-kernel - Re: [PATCH -next 004/491] PERFORMANCE EVENTS SUBSYSTEM: Use fallthrough;

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Date:   Wed, 11 Mar 2020 23:15:00 -0700
From:   Joe Perches <joe@...ches.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org
Subject: Re: [PATCH -next 004/491] PERFORMANCE EVENTS SUBSYSTEM: Use
 fallthrough;

On Wed, 2020-03-11 at 16:30 +0100, Peter Zijlstra wrote:
> On Tue, Mar 10, 2020 at 09:51:18PM -0700, Joe Perches wrote:
> > Convert the various uses of fallthrough comments to fallthrough;
> > 
> > Done via script
> > Link: https://lore.kernel.org/lkml/b56602fcf79f849e733e7b521bb0e17895d390fa.1582230379.git.joe.com/
> > 
> > Signed-off-by: Joe Perches <joe@...ches.com>
> 
> The subject can use a little less screaming, but the actual patch is
> fine.

Patch subject come from the MAINTAINERS subsystem/section heading
because I don't see a better way to script the patch subject that
is more effective.

Using something like:

$ cat get_patch_subject_prefix.bash
#!/bin/bash
git log --format="%s" --no-merges -200 --since=2-years-ago $@ | \
  cut -f1 -d":" | \
  sort  | uniq -c | sort -rn | head -1 | \
  sed 's/^[[:space:]]*[[:digit:]]*[[:space:]]*//'
$

Does well for some sets of files, less well for others.

For instance:

$ ./get_patch_subject_prefix.bash drivers/net/ethernet/intel/
ice

which is just one of 10 or so subsystems of intel/...

And there's no way I'm going to individually edit
~500 patches for every specific maintainer's preference.