[PATCH] [PATCH] arm64: Boot failure on m400 with new cont PTEs

[jlinton@redhat.com (Jeremy Linton)]

On 11/23/2015 09:41 AM, Will Deacon wrote:

> For these reasons, we have no viable option other than reverting the
> offending series until the underlying problem is fixed properly. With
> any luck, that's the 4.5 timeframe so we really only lose a single
> release (providing that you have time to rebase and repost).


That is fine but, I think you need to take this fix anyway (or something 
similar), because there _IS_ a TLB flush bug in that code path. I saw it 
when I wrote the original path, but discounted it assuming that the 
original authors had more insight on the hardware than I did.

Whether the fix takes the suggest form or another, the cont bit changes 
are only irritating an existing bug, not causing it.