ACK/cmt: [PATCH][Zesty] UBUNTU: SAUCE: powerpc: Only do ERAT invalidate

[Stefan Bader]

On 29.06.2017 23:07, Seth Forshee wrote:
> On Tue, Jun 27, 2017 at 04:09:24PM -0300, Breno Leitao wrote:
>> From: Michael Neuling <mikey at neuling.org>
>>
>> BugLink: https://bugs.launchpad.net/ubuntu/+bug/1700819
>>
>> On P9 (Nimbus) DD2 and later, in radix mode, the move to the PID
>> register will implicitly invalidate the user space ERAT entries
>> and leave the kernel ones alone. Thus the only thing needed is
>> an isync() to synchronize this with subsequent uaccess's
>>
>> Signed-off-by: Michael Neuling <mikey at neuling.org>
>> Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
>> Signed-off-by: Breno Leitao <leitao at debian.org>
> 
> Note to whoever applies this, this is now commit
> 74e27c6af56fe6898c3c8c451595746a992f0f0f in linux-next, so it can be
> applied as a cherry-pick and not a sauce patch.
> 
> Acked-by: Seth Forshee <seth.forshee at canonical.com>

Also ACK from me but with the additional note that this now is upstream (same
SHA1) and different (was the same on next) commit msg: "powerpc: Only do ERAT
invalidate on radix context switch on P9 DD1"

-Stefan

> 
> Also cherry picked from linux-next to artful/master-next and
> unstable/master. Thanks!
> 
> 


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