Re: [GIT PULL] Immutable tag between the Bluetooth and pwrseq branches for v6.11-rc1

[Bartosz Golaszewski <brgl@bgdev.pl>]

On Wed, Jun 19, 2024 at 8:59 PM Luiz Augusto von Dentz
<luiz.dentz@gmail.com> wrote:
>
> Hi Bartosz,
>
> On Wed, Jun 19, 2024 at 3:35 AM Bartosz Golaszewski <brgl@bgdev.pl> wrote:
> >
> > On Wed, Jun 12, 2024 at 5:00 PM Bartosz Golaszewski <brgl@bgdev.pl> wrote:
> > >
> > > On Wed, Jun 12, 2024 at 4:54 PM Luiz Augusto von Dentz
> > > <luiz.dentz@gmail.com> wrote:
> > > >
> > > > Hi Bartosz,
> > > >
> > > > On Wed, Jun 12, 2024 at 10:45 AM Bartosz Golaszewski <brgl@bgdev.pl> wrote:
> > > > >
> > > > > On Wed, Jun 12, 2024 at 4:43 PM Luiz Augusto von Dentz
> > > > > <luiz.dentz@gmail.com> wrote:
> > > > > >
> > > > > > Hi Bartosz,
> > > > > >
> > > > > > On Wed, Jun 12, 2024 at 3:59 AM Bartosz Golaszewski <brgl@bgdev.pl> wrote:
> > > > > > >
> > > > > > > From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> > > > > > >
> > > > > > > Hi Marcel, Luiz,
> > > > > > >
> > > > > > > Please pull the following power sequencing changes into the Bluetooth tree
> > > > > > > before applying the hci_qca patches I sent separately.
> > > > > > >
> > > > > > > Link: https://lore.kernel.org/linux-kernel/20240605174713.GA767261@bhelgaas/T/
> > > > > > >
> > > > > > > The following changes since commit 83a7eefedc9b56fe7bfeff13b6c7356688ffa670:
> > > > > > >
> > > > > > >   Linux 6.10-rc3 (2024-06-09 14:19:43 -0700)
> > > > > > >
> > > > > > > are available in the Git repository at:
> > > > > > >
> > > > > > >   git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git tags/pwrseq-initial-for-v6.11
> > > > > > >
> > > > > > > for you to fetch changes up to 2f1630f437dff20d02e4b3f07e836f42869128dd:
> > > > > > >
> > > > > > >   power: pwrseq: add a driver for the PMU module on the QCom WCN chipsets (2024-06-12 09:20:13 +0200)
> > > > > > >
> > > > > > > ----------------------------------------------------------------
> > > > > > > Initial implementation of the power sequencing subsystem for linux v6.11
> > > > > > >
> > > > > > > ----------------------------------------------------------------
> > > > > > > Bartosz Golaszewski (2):
> > > > > > >       power: sequencing: implement the pwrseq core
> > > > > > >       power: pwrseq: add a driver for the PMU module on the QCom WCN chipsets
> > > > > >
> > > > > > Is this intended to go via bluetooth-next or it is just because it is
> > > > > > a dependency of another set? You could perhaps send another set
> > > > > > including these changes to avoid having CI failing to compile.
> > > > > >
> > > > >
> > > > > No, the pwrseq stuff is intended to go through its own pwrseq tree
> > > > > hence the PR. We cannot have these commits in next twice.
> > > >
> > > > Not following you here, why can't we have these commits on different
> > > > next trees? If that is the case how can we apply the bluetooth
> > > > specific ones without causing build regressions?
> > > >
> > >
> > > We can't have the same commits twice with different hashes in next
> > > because Stephen Rothwell will yell at us both.
> > >
> > > Just pull the tag I provided and then apply the Bluetooth specific
> > > changes I sent on top of it. When sending to Linus Torvalds/David
> > > Miller (not sure how your tree gets upstream) mention that you pulled
> > > in the pwrseq changes in your PR cover letter.
>
> By pull the tag you mean using merge commits to merge the trees and
> not rebase, doesn't that lock us down to only doing merge commits
> rather than rebases later on? I have never used merge commits before.
> There is some documentation around it that suggests not to use merges:
>
> 'While merges from downstream are common and unremarkable, merges from
> other trees tend to be a red flag when it comes time to push a branch
> upstream. Such merges need to be carefully thought about and well
> justified, or there’s a good chance that a subsequent pull request
> will be rejected.'
> https://docs.kernel.org/maintainer/rebasing-and-merging.html#merging-from-sibling-or-upstream-trees
>
> But then looking forward in that documentation it says:
>
> 'Another reason for doing merges of upstream or another subsystem tree
> is to resolve dependencies. These dependency issues do happen at
> times, and sometimes a cross-merge with another tree is the best way
> to resolve them; as always, in such situations, the merge commit
> should explain why the merge has been done. Take a moment to do it
> right; people will read those changelogs.'
>
> So I guess that is the reason we want to merge the trees, but what I'm
> really looking forward to is for the 'proper' commands and commit
> message to use to make sure we don't have problems in the future.
>

You shouldn't really need to rebase your branch very often anyway.
This is really for special cases. But even then you can always use:
`git rebase --rebase-merges` to keep the merge commits.

The commands you want to run are:

git pull git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git
tags/pwrseq-initial-for-v6.11
git am or b4 shazam on the patches targeting the Bluetooth subsystem
git push

That's really it, there's not much else to it.

Bart

> > > Bart
> >
> > Gentle ping.
> >
> > Bart
>
>
>
> --
> Luiz Augusto von Dentz