libhugetlbfs failed with "[Errno 95] Operation not supported" on s390x zVM

Steps:
1. sudo apt-get install git python-minimal -y
2. git clone --depth=1 git://kernel.ubuntu.com/ubuntu/autotest-client-tests
3. git clone --depth=1 git://kernel.ubuntu.com/ubuntu/autotest
4. rm -fr autotest/client/tests
5. ln -sf ~/autotest-client-tests autotest/client/tests
6. AUTOTEST_PATH=/home/ubuntu/autotest sudo -E autotest/client/autotest-local --verbose autotest/client/tests/libhugetlbfs/control

It will failed with the following python code piece when trying to access /proc/sys/vm/nr_hugepages:

utils.write_one_line('/proc/sys/vm/nr_hugepages', str(pages_requested))

With error message:
  [Errno 95] Operation not supported

For Xenial, the error message is:
  [Errno 524] Unknown error 524

This issue is not a regression.

Full error log:

$ AUTOTEST_PATH=/home/ubuntu/autotest sudo -E autotest/client/autotest-local --verbose autotest/client/tests/libhugetlbfs/control

07:20:37 INFO | Writing results to /home/ubuntu/autotest/client/results/default
07:20:37 DEBUG| Initializing the state engine
07:20:37 DEBUG| Persistent state client.steps now set to []
07:20:37 DEBUG| Persistent option harness now set to None
07:20:37 DEBUG| Persistent option harness_args now set to None
07:20:37 DEBUG| Selected harness: standalone
07:20:48 INFO | START ---- ---- timestamp=1509607248 localtime=Nov 02 07:20:48
07:20:48 DEBUG| Persistent state client._record_indent now set to 1
07:20:48 INFO | START libhugetlbfs libhugetlbfs timestamp=1509607248 localtime=Nov 02 07:20:48
07:20:48 DEBUG| Persistent state client._record_indent now set to 2
07:20:48 DEBUG| Persistent state client.unexpected_reboot now set to ('libhugetlbfs', 'libhugetlbfs')
07:20:49 DEBUG| Running 'apt-get install --yes --force-yes build-essential git gcc'
07:20:50 DEBUG| [stdout] Reading package lists...
07:20:50 DEBUG| [stdout] Building dependency tree...
07:20:50 DEBUG| [stdout] Reading state information...
07:20:50 DEBUG| [stdout] build-essential is already the newest version (12.4ubuntu1).
07:20:50 DEBUG| [stdout] gcc is already the newest version (4:7.2.0-1ubuntu1).
07:20:50 DEBUG| [stdout] git is already the newest version (1:2.14.1-1ubuntu4).
07:20:50 DEBUG| [stdout] The following packages were automatically installed and are no longer required:
07:20:50 DEBUG| [stdout] containerd linux-headers-4.13.0-14 linux-headers-4.13.0-14-generic
07:20:50 DEBUG| [stdout] linux-image-4.13.0-14-generic linux-image-extra-4.13.0-14-generic runc
07:20:50 DEBUG| [stdout] Use 'sudo apt autoremove' to remove them.
07:20:50 DEBUG| [stdout] 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
07:20:50 ERROR| [stderr] W: --force-yes is deprecated, use one of the options starting with --allow instead.
07:20:50 DEBUG| Running 'which gcc'
07:20:50 DEBUG| [stdout] /usr/bin/gcc
07:20:53 ERROR| Exception escaping from test:
Traceback (most recent call last):
  File "/home/ubuntu/autotest/client/shared/test.py", line 378, in _exec
    _cherry_pick_call(self.initialize, *args, **dargs)
  File "/home/ubuntu/autotest/client/shared/test.py", line 738, in _cherry_pick_call
    return func(*p_args, **p_dargs)
  File "/home/ubuntu/autotest/client/tests/libhugetlbfs/libhugetlbfs.py", line 39, in initialize
    str(pages_requested))
  File "/home/ubuntu/autotest/client/shared/utils.py", line 408, in write_one_line
    open_write_close(filename, line.rstrip('\n') + '\n')
  File "/home/ubuntu/autotest/client/shared/utils.py", line 416, in open_write_close
    f.close()
IOError: [Errno 95] Operation not supported

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: linux-image-4.13.0-16-generic 4.13.0-16.19
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic s390x
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access '/dev/snd/': No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.7-0ubuntu3
Architecture: s390x
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord'
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
Date: Thu Nov 2 07:18:00 2017
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
Lspci:

Lsusb: Error: command ['lsusb'] failed with exit code 1:
PciMultimedia:

ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=C
 SHELL=/bin/bash
ProcFB: Error: [Errno 2] No such file or directory: '/proc/fb'
ProcKernelCmdLine: root=/dev/mapper/kl04vg01-kl04root crashkernel=196M BOOT_IMAGE=0
RelatedPackageVersions:
 linux-restricted-modules-4.13.0-16-generic N/A
 linux-backports-modules-4.13.0-16-generic N/A
 linux-firmware 1.169
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)