Re: [PATCH 7/8] membarrier: Remove arm (32) support for SYNC_CORE

From: Linus Walleij
Date: Fri Jun 18 2021 - 08:54:21 EST

On Wed, Jun 16, 2021 at 6:27 PM Russell King (Oracle)
<linux@xxxxxxxxxxxxxxx> wrote:

> Arnd tells me that the current remaining ARM11MPCore users are:
> - CNS3xxx (where there is some martinal interest in the Gateworks
> Laguna platform)
> - Similar for OXNAS
> - There used to be the Realview MPCore tile - I haven't turned that on
> in ages, and it may be that the 3V cell that backs up the encryption
> keys is dead so it may not even boot.

I have this machine with 4 x ARM11 MPCore, it works like a charm.
I use it to test exactly this kind of stuff, I know if a kernel works
on ARM11MPCore it works on anything because of how fragile
it is.

> So it seems to come down to a question about CNS3xxx and OXNAS. If
> these aren't being used, maybe we can drop ARM11MPCore support and
> the associated platforms?
> Linus, Krzysztof, Neil, any input?

I don't especially need to keep the ARM11MPCore machine alive,
it is just a testchip after all. The Oxnas is another story, that has wide
deployment and was contributed recently (2016) and has excellent
support in OpenWrt so I wouldn't really want
to axe that.

Linus Walleij