ACK: [SRU][J/realtime][PATCH 0/1] Fix for LP:1972899

[Dimitri John Ledkov]

Somehow it feels we should apply this fix to Jammy GA kernel no? Given
we are likely to hit this issue again in other parts of the codebase.
Since it came from our AMX patchset which looks incomplete.

-- 
okurrr,

Dimitri

On Wed, 11 May 2022 at 06:08, Andrea Righi <andrea.righi at canonical.com> wrote:
>
> On Tue, May 10, 2022 at 04:05:45PM -0400, Joseph Salisbury wrote:
> > BugLink: https://bugs.launchpad.net/bugs/1972899
> >
> > [SRU Justification]
> > A new commit in the Jammy 5.15.0-29.30 kernel is causing a build failure
> > for the real-time kernel.
> >
> > After a bisect, I found this commit is causing the real-time kernel build
> > failure:
> > dc66c1b8a2be1 ("x86/pkru: Remove useless include")
> >
> > Commit dc66c1b8a2be1 was added in 5.16-rc1 and not cc'd to stable. It was
> > picked into Jammy to enable AMX support. See bug 1967750.
> >
> > The following commit resolves this regression by fixing up the includes:
> > 35fa745286ac4 ("x86/mm: Include spinlock_t definition in pgtable")
> >
> > Commit 35fa745286ac4 was merged into mainline 5.17-rc1.
> >
> > [Fix]
> > 35fa745286ac4 ("x86/mm: Include spinlock_t definition in pgtable")
> >
> > [Test case]
> > Real-time kernel builds are now working after picking this commit.
> >
> > [Regression potential]
> > Low. The new commit is just including a header file.
>
> Looks good to me, thanks!
>
> Acked-by: Andrea Righi <andrea.righi at canonical.com>
>
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