Merge tag 'kvm-s390-next-4.20-2' of...

Merge tag 'kvm-s390-next-4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

KVM: s390/vfio-ap: Fixes and enhancements for vfio-ap

- add tracing
- fix a locking bug
- make local functions and data static