On Wed, Sep 10, 2014 at 02:21:59PM +0100, Bjorn Helgaas wrote:

On Wed, Sep 10, 2014 at 7:04 AM, Will Deacon [off-list ref] wrote:

quoted

It's blindingly obvious that acpi=off is there to disable ACPI at boot.
We either support that option or we don't -- none of this `oh, well you
can use it in this specific case I suppose' rubbish. I'm not questioning
your use-case, but there's really no need to talk about an `orderly
adoption' when all you need to say is that your ACPI is busted and passing
acpi=off lets you boot with a devicetree.

Maybe we should set a taint bit or give some other indication that
we're using a flag to work around breakage.

That sounds like a good idea. Working around breakage is a fact of life,
but the taint indicates that it's not the ideal behaviour.

Will