[RFC PATCH 4/8] powerpc: add CPU field to struct thread_info

[Kees Cook]

On Thu, Sep 30, 2021 at 08:46:04AM +1000, Michael Ellerman wrote:
> Ard Biesheuvel <ardb at kernel.org> writes:
> > On Tue, 28 Sept 2021 at 02:16, Michael Ellerman <mpe at ellerman.id.au> wrote:
> >>
> >> Michael Ellerman <mpe at ellerman.id.au> writes:
> >> > Ard Biesheuvel <ardb at kernel.org> writes:
> >> >> On Tue, 14 Sept 2021 at 14:11, Ard Biesheuvel <ardb at kernel.org> wrote:
> >> >>>
> >> >>> The CPU field will be moved back into thread_info even when
> >> >>> THREAD_INFO_IN_TASK is enabled, so add it back to powerpc's definition
> >> >>> of struct thread_info.
> >> >>>
> >> >>> Signed-off-by: Ard Biesheuvel <ardb at kernel.org>
> >> >>
> >> >> Michael,
> >> >>
> >> >> Do you have any objections or issues with this patch or the subsequent
> >> >> ones cleaning up the task CPU kludge for ppc32? Christophe indicated
> >> >> that he was happy with it.
> >> >
> >> > No objections, it looks good to me, thanks for cleaning up that horror :)
> >> >
> >> > It didn't apply cleanly to master so I haven't tested it at all, if you can point me at a
> >> > git tree with the dependencies I'd be happy to run some tests over it.
> >>
> >> Actually I realised I can just drop the last patch.
> >>
> >> So that looks fine, passes my standard quick build & boot on qemu tests,
> >> and builds with/without stack protector enabled.
> >>
> >
> > Thanks.
> >
> > Do you have any opinion on how this series should be merged? Kees Cook
> > is willing to take them via his cross-arch tree, or you could carry
> > them if you prefer. Taking it via multiple trees at the same time is
> > going to be tricky, or take two cycles, with I'd prefer to avoid.
> 
> I don't really mind. If Kees is happy to take it then that's OK by me.
> 
> If Kees put the series in a topic branch based off rc2 then I could
> merge that, and avoid any conflicts.

I've created:

git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/thread_info/cpu

it includes a --no-ff merge commit, which I'm not sure is desirable? Let
me know if I should adjust this, or if Linus will yell about this if I
send him a PR containing a merge commit? I'm not sure what's right here.

Thanks!

-- 
Kees Cook