Re: [PATCH v2] checkpatch.pl: warn on invalid commit id

[Andrew Morton <akpm@linux-foundation.org>]

On Thu, 25 Jul 2019 11:26:04 +0200 Matteo Croce <mcroce@redhat.com> wrote:

> On Thu, Jul 25, 2019 at 5:07 AM Andrew Morton <akpm@linux-foundation.org> wrote:
> > What does it do if we're not operating in a git directory? For example,
> > I work in /usr/src/25 and my git repo is in ../git26.
> >
> 
> If .git is not found, the check is disabled

We could permit user to set an environment variable to tell checkpatch
where the kernel git tree resides.

> > Also, what happens relatively often is that someone quotes a linux-next
> > or long-term-stable hash.  If the user has those trees in the git repo,
> > I assume they won't be informed of the inappropriate hash?
> >
> 
> In this case it won't warn, but this should not be a problem, as the
> hash doesn't change following a merge.
> The problem is just if the other tree gets rebased, or if the other
> tree gets never merged, e.g. stable/linux-*

linux-next patches get rebased quite often.  I guess this is acceptable
- failing to warn about an error is better than warning about
not-an-error.