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From: Alexander Dahl <ada@thorsis.com>
Subject: Re: How to apply RT patches to a kernel not listed in http://cdn.kernel.org/pub/linux/kernel/projects/rt/4.9/older/
Date: Tue, 31 Jul 2018 09:42:03 +0200
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Cc: Patrick Doyle <wpdster@gmail.com>

Hei hei,

Am Montag, 30. Juli 2018, 17:26:15 CEST schrieb Patrick Doyle:
> It turns out that there is a v4.9.87-rt65 in the linux-rt tree, but it
> doesn't apply to the linux-at91 tree because they have a customized
> variant of kernel/softirq.c.  (They had to revert an earlier commit on
> mainline).  Since I am likely to want a newer kernel in the future
> anyway, I figured I would try the rebase effort first, and have the
> create-a-patch-to-revert-the-revert approach as a plan B.

Is there any particular reason to use that tree instead of running vanilla 
which has good at91 support, also in v4.9?

(I am using PREEMPT_RT on top of vanilla v4.9.x with an at91sam9g20.)

Greets
Alex