ACK: [Artful] (upstream) cherry-pick mmu_notifier fix to prevent Windows BSODs

[Colin Ian King]

On 19/12/17 08:52, Fabian Grünbichler wrote:
> BugLink: https://bugs.launchpad.net/bugs/1738972
> 
> Impact: Windows 2016 and 10 VMs running in Qemu VMs using KVM trigger
> BSODs under certain memory conditions
> 
> Fix: Single follow-up upstream cherry pick which fixes the problem.
> 
> Regression Potential: Merged in 4.15 and 4.14.6, tested by multiple
> affected users.
> 
> see https://marc.info/?l=linux-kernel&m=151203441531472&w=2 for the long
> writeup
> 
> clean cherry-pick from 4.14.6
> 

Clean cherry pick with testing, so looks OK.

Acked-by: Colin Ian King <colin.king at canonical.com>