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Date:   Thu, 17 Mar 2022 10:02:45 +0100
From:   Daniel Wagner <wagi@monom.org>
To:     gene heskett <gheskett@shentel.net>
Cc:     linux-rt-users <linux-rt-users@vger.kernel.org>
Subject: Re: found linux-stable-rt-4.19.233-rt105-rebase
Message-ID: <20220317090245.riqtsgncpegagvof@carbon.lan>
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 <1680097.7vmoJTWvpf@coyote>
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On Thu, Mar 17, 2022 at 04:33:09AM -0400, gene heskett wrote:
> On Thursday, 17 March 2022 03:09:13 EDT you wrote:
> > Greetings rt-kernel-users;
> > 
> > I managed to trace thru git.kernel.org until I found the above rebase.
> > Downloaded it, moved it to the rpi4, and unpacked it.
> > 
> > But to build it on an rpi4b for armhf, needs a bcm2711-defconfig, and
> > it is not there in this tarball.

RPi4 was released in 2019, while v4.19 got released in October
2018. Hence the upstream v4.19 kernel never had support for the RPi4 as
far I can tell.

> And this one has also lost the bcm2711 support.
> Please advise.

It sounds very likely that you are running a downstream kernel for which
RPi4 support was retrofitted. Nothing lost in upstream stable or
stable-rt kernels.

If you want to run upstream kernels, I suggest you pick a newer kernel
which supports RPi4.