On Tue, Oct 6, 2020 at 11:16 AM Ard Biesheuvel [off-list ref] wrote:

We don't actually unmap the DT from the linear region, we just alias
it elsewhere in the VA space, so that we don't have to reason about
whether the DT is in the first memblock or below/above/whatever.

So the DT is just one of the many memblock_reservations, and this
actually doesn't change - the DT is still there, it is reserved, we
just access it via another route.

Yeah I see.

I had a conversation with Rob Herring where he said it would be
nice if ARM used unflatten_and_copy_device_tree() like most
other architectures, but I don't know what it would bring us?
(Paging Rob.)

Yours,
Linus Walleij

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel