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Date:   Wed, 12 Aug 2020 23:42:44 -0400
From:   Jarod Wilson <jarod@...hat.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Netdev <netdev@...r.kernel.org>
Subject: Re: [RFC] bonding driver terminology change proposal

On Thu, Jul 16, 2020 at 1:43 AM Jarod Wilson <jarod@...hat.com> wrote:
>
> On Wed, Jul 15, 2020 at 11:18 PM Andrew Lunn <andrew@...n.ch> wrote:
...
> > I really think that before we consider changes like this, somebody
> > needs to work on git tooling, so that it knows when mass renames have
> > happened, and can do the same sort of renames when cherry-picking
> > across the flag day. Without that, people trying to maintain stable
> > kernels are going to be very unhappy.
>
> I'm not familiar enough with git's internals to have a clue where to
> begin for something like that, but I suspect you're right. Doing
> blanket renames in stable branches sounds like a terrible idea, even
> if it would circumvent the cherry-pick issues. I guess now is as good
> a time as any to start poking around at git's internals...

I haven't forgotten about this, just been tied up with other work. I
spent a bit of time getting lost in git's internals, and the best idea
I've had suggested to me is some sort of cherry-pick hook that
executes an external script to massage variables back to old names for
-stable backporting. Could live somewhere in-tree, and maintainers
would have to know about it, but it would be reasonably painless.
Ideally, I was thinking a semantic patch to filter the backported
patch through, but haven't yet spent enough time playing with
coccinelle to know if that's actually a viable idea, since it's
designed to run on C code, not a patch, as I understand it.
Worst-case, it'd be a shell script doing some awk/sed/whatever.

-- 
Jarod Wilson
jarod@...hat.com

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