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From:   Arnd Bergmann <arnd@arndb.de>
Date:   Thu, 18 Jan 2018 10:56:53 +0100
Message-ID: <CAK8P3a2qx5pZmE-=QM5Bwrsib4XcfVac7RQr-QMzEseQ_oBPEA@mail.gmail.com>
Subject: Re: [PATCH v6 03/36] sparc: io: To use the define of
 ioremap_[nocache|wc|wb] in asm-generic/io.h
To:     Greentime Hu <green.hu@gmail.com>
Cc:     Greentime <greentime@andestech.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
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On Mon, Jan 15, 2018 at 6:53 AM, Greentime Hu <green.hu@gmail.com> wrote:
> From: Greentime Hu <greentime@andestech.com>
>
> It will be built failed if commit id: d25ea659 is selected. This patch
> can fix this build error.
>
> Signed-off-by: Greentime Hu <greentime@andestech.com>

The change is fine, but the reference to commit 'd25ea659' is not for
two reasons:

- when you rebase the tree, you will get a different ID
- the recommended format for referring to another commit is to list it with
  12 digits and the one-line summary like this:

   commit d25ea659bc37 ("asm-generic/io.h: move
  ioremap_nocache/ioremap_uc/ioremap_wc/ioremap_=E2=80=A6")

- Ideally you use a 'Fixes:' tag in the patch description.

You can add these lines in your .gitconfig to help you here

[alias]
        fixes =3D show --format=3D'Fixes: %h (\"%s\")' -s
[core]
        abbrev =3D 12

That will give you a 'git fixes' command to output the Fixes: line
in the correct format for future bug fixes. For this particular change,
I would actually just merge the two patches into one patch that
then doesn't break anything in the first place.

      Arnd