Thanks, Bjorn.

I added in /root/.gitconfig
...
[core]
        abbrev = 12
[pretty]
        fixes = Fixes: %h (\"%s\")
...

Still, "git log" shows more than 12 digits, like:
commit 0a528ee9a52007984fa60b0c4ef1f39fdf5edf8d
Author: Tariq Toukan [off-list ref]
Date:   Wed Jun 7 16:26:15 2017 +0300

    IB/mlx4: Bump driver version

Does it work for you ?

Regards,
Kevin



On Tue, Jun 6, 2017 at 11:57 PM, Bj?rn Mork [off-list ref] wrote:

Kevin Wilson [off-list ref] writes:

quoted

Hi,
I want to send a patch to LKML fixing something wrong which was caused
by other patch.

Form what I understand, it is a good practice to mention the commit
title and the commit ID.

A commit ID is very long. My question is: when mentioning in my commit
log the patch that caused the problem, what is the minimum commit id
length which I should use when presenting the patch that caused the
problem ? is such commit length is documented anywhere ?

12

It's mentioned here and there.  One place is the .git/config example in
section "2) Describe your changes" in
Documentation/process/submitting-patches.rst :


 The following ``git config`` settings can be used to add a pretty format for
 outputting the above style in the ``git log`` or ``git show`` commands::

         [core]
                 abbrev = 12
         [pretty]
                 fixes = Fixes: %h (\"%s\")


(BTW, using the "Fixes" tag might be appropriate for your patch)


Or see for example:
https://public-inbox.org/git/CA+55aFy0_pwtFOYS1Tmnxipw9ZkRNCQHmoYyegO00pjMiZQfbg at mail.gmail.com/


Bj?rn