[UBUNTU 20.04] hypfs: fix listing z/VM guests with access control group set

[bugproxy]

Description: hypfs: fix listing z/VM guests with access control group set

Symptom: hypfs/hyptop info doesn't include z/VM guests with access
               control group set

Problem: Currently if z/VM guest is allowed to retrieve hypervisor
               performance data globally for all guests (privilege class B)
               the query is formed in a way to include all guests but the
               group name is left empty. This leads to that z/VM guests
               which have access control group set not being included in
               the results (even local vm).

Solution: Change the query group identifier from empty to "any"
               to retrieve information about all guests from any groups
               (or without a group set).

Reproduction: Run hyptop under z/VM from a guest with privilege class
               B and some guest(s) with RACF/ACI groups set.

Upstream-ID: 663d34c8df98740f1e90241e78e456d00b3c6cad

Master-BZ ID: 196350

Distros: Ubuntu 20.04

Preventive: yes

[Frank Heimes (fheimes)]

I'm glad to see that the commit:
663d34c8df98 663d34c8df98740f1e90241e78e456d00b3c6cad "s390/hypfs: include z/VM guests with access control group set"
got tagged for stable update:
"Cc: <email address hidden>"
With that, such commits will automatically be picked up by the Ubuntu kernel team's
"<Focal> update: vx.x.xxx upstream stable release" process.

And this already happend for this upstream commit 663d34c8df98 "s390/hypfs: include z/VM guests with access control group set" and it landed as:
c69c6a859ddf in focal and is included in "Ubuntu-5.4.0-108.122" and newer kernels,
2c1d2cb370a0 in impish and is included in "Ubuntu-5.13.0-40.45" and newer kernels,
and as
385f0593f13e in jammy and is included in "Ubuntu-5.15.0-20.20" and newer kernels.

And since the commit got upstream accepted with 5.17, it will automatically be part of the planned kinetic kernel (5.19).

With this I'm closing this bug as Fix Released.