Re: [PATCH] init_task: Include <linux/rbtree.h> in the right file

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On Sun, 2022-12-04 at 14:55 +0100, Marco Elver wrote:
> [+Cc Ingo, who had been working on lots of include improvements.]
> 
> The Cc list is odd -- it appears that get_maintainers.pl is broken on
> init_task.c:
> 
> 	$> ./scripts/get_maintainer.pl init/init_task.c
> 	Mark Rutland <mark.rutland@xxxxxxx> (commit_signer:1/1=100%)
> 	"Paul E. McKenney" <paulmck@xxxxxxxxxx> (commit_signer:1/1=100%)
> 	Marco Elver <elver@xxxxxxxxxx> (commit_signer:1/1=100%,authored:1/1=100%,removed_lines:5/5=100%)
> 	linux-kernel@xxxxxxxxxxxxxxx (open list)
> 
> What's going on here?

No one claims to be a maintainer of any init/ files
($ git grep "^F:.*init" MAINTAINERS)
so by default it merely shows the people that have patched the
particular file in the last year.

You could perhaps see this better by adding --no-git --no-gitfallback
to the get_maintainer.pl command line

$ ./scripts/get_maintainer.pl --nogit --nogit-fallback init/init_task.c
linux-kernel@xxxxxxxxxxxxxxx (open list)

see the --help option for details

$ ./scripts/get_maintainer.pl --help
usage: ./scripts/get_maintainer.pl [options] patchfile
       ./scripts/get_maintainer.pl [options] -f file|directory
version: 0.26

MAINTAINER field selection options:
  --email => print email address(es) if any
    --git => include recent git *-by: signers
    --git-all-signature-types => include signers regardless of signature type
        or use only (Signed-off-by:|Reviewed-by:|Acked-by:) signers (default: 0)
    --git-fallback => use git when no exact MAINTAINERS pattern (default: 1)
    --git-chief-penguins => include (Linus Torvalds)
    --git-min-signatures => number of signatures required (default: 1)
    --git-max-maintainers => maximum maintainers to add (default: 5)
    --git-min-percent => minimum percentage of commits required (default: 5)
    --git-blame => use git blame to find modified commits for patch or file
    --git-blame-signatures => when used with --git-blame, also include all commit signers
    --git-since => git history to use (default: 1-year-ago)
    --hg-since => hg history to use (default: -365)
    --interactive => display a menu (mostly useful if used with the --git option)
    --m => include maintainer(s) if any
    --r => include reviewer(s) if any
    --n => include name 'Full Name <addr@xxxxxxxxxx>'
    --l => include list(s) if any
    --moderated => include moderated lists(s) if any (default: true)
    --s => include subscriber only list(s) if any (default: false)
    --remove-duplicates => minimize duplicate email names/addresses
    --roles => show roles (status:subsystem, git-signer, list, etc...)
    --rolestats => show roles and statistics (commits/total_commits, %)
    --file-emails => add email addresses found in -f file (default: 0 (off))
    --fixes => for patches, add signatures of commits with 'Fixes: <commit>' (default: 1 (on))
  --scm => print SCM tree(s) if any
  --status => print status if any
  --subsystem => print subsystem name if any
  --web => print website(s) if any

Output type options:
  --separator [, ] => separator for multiple entries on 1 line
    using --separator also sets --nomultiline if --separator is not [, ]
  --multiline => print 1 entry per line

Other options:
  --pattern-depth => Number of pattern directory traversals (default: 0 (all))
  --keywords => scan patch for keywords (default: 1)
  --sections => print all of the subsystem sections with pattern matches
  --letters => print all matching 'letter' types from all matching sections
  --mailmap => use .mailmap file (default: 1)
  --no-tree => run without a kernel tree
  --self-test => show potential issues with MAINTAINERS file content
  --version => show version
  --help => show this help information

Default options:
  [--email --tree --nogit --git-fallback --m --r --n --l --multiline
   --pattern-depth=0 --remove-duplicates --rolestats]

Notes:
  Using "-f directory" may give unexpected results:
      Used with "--git", git signators for _all_ files in and below
          directory are examined as git recurses directories.
          Any specified X: (exclude) pattern matches are _not_ ignored.
      Used with "--nogit", directory is used as a pattern match,
          no individual file within the directory or subdirectory
          is matched.
      Used with "--git-blame", does not iterate all files in directory
  Using "--git-blame" is slow and may add old committers and authors
      that are no longer active maintainers to the output.
  Using "--roles" or "--rolestats" with git send-email --cc-cmd or any
      other automated tools that expect only ["name"] <email address>
      may not work because of additional output after <email address>.
  Using "--rolestats" and "--git-blame" shows the #/total=% commits,
      not the percentage of the entire file authored.  # of commits is
      not a good measure of amount of code authored.  1 major commit may
      contain a thousand lines, 5 trivial commits may modify a single line.
  If git is not installed, but mercurial (hg) is installed and an .hg
      repository exists, the following options apply to mercurial:
          --git,
          --git-min-signatures, --git-max-maintainers, --git-min-percent, and
          --git-blame
      Use --hg-since not --git-since to control date selection
  File ".get_maintainer.conf", if it exists in the linux kernel source root
      directory, can change whatever get_maintainer defaults are desired.
      Entries in this file can be any command line argument.
      This file is prepended to any additional command line arguments.
      Multiple lines and # comments are allowed.
  Most options have both positive and negative forms.
      The negative forms for --<foo> are --no<foo> and --no-<foo>.





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