From: Joe Perches <joe@perches.com>
Subject: Re: rfc: rewrite commit subject line for subsystem maintainer
 preference tool
Date: Tue, 16 Nov 2010 12:42:36 -0800
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References: <1289845830.16461.149.camel@Joe-Laptop>
	 <20101115190738.GF3338@sirena.org.uk>
	 <1289848458.16461.150.camel@Joe-Laptop>
	 <20101115193407.GK12986@rakim.wolfsonmicro.main>
	 <1289850773.16461.166.camel@Joe-Laptop>
	 <20101116104921.GL12986@rakim.wolfsonmicro.main>
	 <1289919077.28741.50.camel@Joe-Laptop>
	 <20101116183707.179964dd@schatten.dmk.lab>
	 <20101116181226.GB26239@rakim.wolfsonmicro.main>
	 <20101116203522.65240b18@schatten.dmk.lab>
	 <20101116195530.GA7523@rakim.wolfsonmicro.main>
	 <20101116122102.86e7e0b9.rdunlap@xenotime.net>
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Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>,
	Florian Mickler <florian@mickler.org>,
	Jiri Kosina <trivial@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org
To: Randy Dunlap <rdunlap@xenotime.net>
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On Tue, 2010-11-16 at 12:21 -0800, Randy Dunlap wrote:
> On Tue, 16 Nov 2010 19:55:31 +0000 Mark Brown wrote:
> I don't know what you asked Joe to change, but asking someone to use
> the documented canonical patch format:
> <quote>
> The canonical patch subject line is:
>     Subject: [PATCH 001/123] subsystem: summary phrase
> </quote>
> should be fine.  And there is no need for printf-ish templates
> for this in MAINTAINERS either.

I've never read that before.  Learn something new etc...
It seems path prefixes aren't good nor even commonly used.

A review of kernel patch subjects:

$ git log --no-merges --pretty=oneline | \
	cut -f2- -d" " | cut -f1 -d: | sort | uniq -c | sort -rn

is interesting.  Here's the head:
   5007 x86
   3943 Staging
   3220 USB
   2790 sh
   2707 KVM
   2624 ARM
   2449 ALSA
   1571 Input
   1549 ASoC
   1470 iwlwifi
   1423 ACPI
   1397 mac80211
   1384 V4L/DVB
   1226 sched
   1200 Btrfs
   1184 powerpc
   1106 [NETFILTER]
   1080 MIPS
   1049 net
   1047 ide
   1014 drm/i915
    993 staging
    921 ath9k

Some subsystem maintainers like upper case, some mixed, some lower.
Some aren't consistent.  (Staging/staging)

It doesn't seem a rule can be pregenerated so maybe adding these
"C:" lines to MAINTAINERS has some value.