Re: [PATCH 18/22] mm: mark DEVICE_PUBLIC as broken

From: Christoph Hellwig
Date: Tue Jun 25 2019 - 07:59:56 EST

On Tue, Jun 25, 2019 at 11:44:28AM +0000, Jason Gunthorpe wrote:
> Which tree and what does the resolution look like?

Looks like in -mm. The current commit in linux-next is:

commit 0d23b042f26955fb35721817beb98ba7f1d9ed9f
Author: Robin Murphy <robin.murphy@xxxxxxx>
Date: Fri Jun 14 10:42:14 2019 +1000

mm: clean up is_device_*_page() definitions

> Also, I don't want to be making the decision if we should keep/remove
> DEVICE_PUBLIC, so let's get an Ack from Andrew/etc?
> My main reluctance is that I know there is HW out there that can do
> coherent, and I want to believe they are coming with patches, just
> too slowly. But I'd also rather those people defend themselves :P

Lets keep everything as-is for now. I'm pretty certain nothing
will show up, but letting this linger another release or two
shouldn't be much of a problem. And if we urgently feel like removing
it we can do it after -rc1.