On Mon, Oct 21, 2019 at 03:24:47PM +0200, Ard Biesheuvel wrote:
> On Mon, 21 Oct 2019 at 15:09, Philippe Mathieu-Daudé <phi...@redhat.com> 
> wrote:
> >
> > On 10/21/19 2:52 PM, Pete Batard wrote:
> > > Hi Philippe,
> > >
> > > On 2019.10.21 13:28, Philippe Mathieu-Daudé wrote:
> > >> Hi Pete,
> > >>
> > >> On 10/21/19 1:25 PM, Pete Batard wrote:
> > >>> In preparation for adding Raspberry Pi 4 support, the Pi 3 platform
> > >>> is restructured by factorizing all the drivers and libraries that are
> > >>> going to be commonly used by the two platforms.
> > >>>
> > >>> Because much of the Pi 4 SoC is an extension of the Pi 3 one this
> > >>> means that almost everything, except the ACPI tables, is moved up
> > >>> into a new common RaspberryPi/ subdirectory that will serve both
> > >>> platforms. The .dec is also moved to this directory, under a new
> > >>> RaspberryPi.dec name, and existing references to it are updated.
> > >>>
> ...
> > >>
> > >> This change seems not related to the rest of your refactor.
> > >
> > > It is. See https://edk2.groups.io/g/devel/message/49288
> > >
> > > The problem is we have no choice but to break the patch in two sections,
> > > one that applies to edk2-platforms and the other to edk2-non-osi, since
> > > these are separate repos, and the LogoDxe changes belong to non-osi.
> > >
> > > We need to have part of the non-osi patch that is applied to
> > > edk2-platforms, and it would make little sense to break it down into the
> > > non-osi related and platforms related, since it still relies on the
> > > non-osi changes having been applied.
> >
> > I see.
> >
> > >
> > > If anything, I guess we could consider that the non-osi patch should
> > > come first. Still, whatever we do here, as long as only one of non-osi
> > > and platform is applied, builds are going to be broken, and there is no
> > > way to fix that unless you do consider the set of platforms + non-osi as
> > > a single patch.
> >
> > Agreed, this is a egg/chicken problem.
> >
> 
> I dealt with this in the past by just making sure the non-osi and
> platform changes are applied at the same time. So it is good to make
> note of this in the cover letter, but other than that, there is no way
> we can apply interdependent changes to two separate repositories at
> the same time without either breaking bisect for one of them, or
> making a huge effort to add temporary code, defines etc that will be
> removed again right after the changes have landed.

Agreed. My preference would be to treat edk2-non-osi as the chicken,
and edk2-platforms the egg. I could put the requisite edk2-non-osi
hash into the edk2-platforms commit message before pushing, adding a
line like:

"This commit requires the edk2-non-osi in use to contain commit <hash>
in order to build."

If I'm feeling nitpicky, that could replace the comment
"No other changes are being applied at this stage."

Pete: would you be OK with those two changes?

Best Regards,

Leif

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