linux-kernel - Re: [PATCH] checkpatch: Also accept commit ids with 13-40 chars of sha1

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Date:   Tue, 05 Dec 2023 12:05:37 -0800
From:   Joe Perches <joe@...ches.com>
To:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Niklas Söderlund 
        <niklas.soderlund@...natech.se>,
        Andy Whitcroft <apw@...onical.com>,
        Dwaipayan Ray <dwaipayanray1@...il.com>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>,
        Louis Peens <louis.peens@...igine.com>,
        Philippe Schenker <philippe.schenker@...adex.com>,
        Simon Horman <horms@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Junio C Hamano <gitster@...ox.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] checkpatch: Also accept commit ids with 13-40 chars of
 sha1

On Tue, 2023-12-05 at 20:34 +0100, Geert Uytterhoeven wrote:
> Documentation/dev-tools/checkpatch.rst says:
> 
>   **GIT_COMMIT_ID**
>     The proper way to reference a commit id is:
>     commit <12+ chars of sha1> ("<title line>")

It's not just checkpatch.

Documentation/process/submitting-patches.rst:``git bisect``, please use the 'Fixes:' tag with the first 12 characters of


So that would need to be updated as well.

And 12 still has quite some headroom.

$ git rev-list --all --abbrev=0 --abbrev-commit | \
  awk '{ a[length] += 1 } END { for (len in a) print len, a[len] }'
5 107
6 684276
7 505734
8 41769
9 2665
10 174
11 8