linux-kernel - Re: linux-next: manual merge of the drm-misc tree with the mm-stable tree

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Message-ID: <20230419163011.GA1865368@dev-arch.thelio-3990X>
Date:   Wed, 19 Apr 2023 09:30:11 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Daniel Vetter <daniel@...ll.ch>
Cc:     Mark Brown <broonie@...nel.org>, Dave Airlie <airlied@...il.com>,
        Intel Graphics <intel-gfx@...ts.freedesktop.org>,
        DRI <dri-devel@...ts.freedesktop.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Christian König <christian.koenig@....com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: manual merge of the drm-misc tree with the mm-stable
 tree

On Wed, Apr 19, 2023 at 06:24:37PM +0200, Daniel Vetter wrote:
> On Tue, Apr 18, 2023 at 07:34:44PM +0100, Mark Brown wrote:
> > On Sun, Apr 16, 2023 at 09:58:50AM +0200, Daniel Vetter wrote:
> > 
> > > Note there was a ppc compile fail, which is why we pushed the ttm revert.
> > > That /should/ be fixed now, but would be good if you can confirm?
> > 
> > According to Nathan (CCed) there's still issues with the interaction
> > with the PowerPC tree.
> 
> So this revert was supposed to fix this: 56e51681246e ("drm/ttm: revert
> "Reduce the number of used allocation orders for TTM pages"")
> 
> If there's anything left then I need to chase that asap since the merge
> window will open soon.

I think we are talking about two different issues here. My issue is not
a compilation failure, it is an incorrect merge resolution that is
happening in -next because of two independent changes in the drm and
powerpc tree, the thread below should have more information.

https://lore.kernel.org/20230413184725.GA3183133@dev-arch.thelio-3990X/

I do not think this is something that either tree can solve
independently of each other, -next has to resolve the conflict correctly
(which is what I point out in the message above) and a note of it should
be passed along to Linus so it can be resolved correctly in mainline
when the time comes.

Cheers,
Nathan