Update2 for ocxl driver

I built a Bionic test kernel with the patch from:
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id=d497ebf5fb3a026c0817f8c96cde57

The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1781436

Can you test this kernel and see if it resolves this bug?

Note about installing test kernels:
• If the test kernel is prior to 4.15(Bionic) you need to install the linux-image and linux-image-extra .deb packages.
• If the test kernel is 4.15(Bionic) or newer, you need to install the linux-modules, linux-modules-extra and linux-image-unsigned .deb packages.

Thanks in advance!

------- Comment From <email address hidden> 2018-07-23 12:58 EDT-------
The test kernel found in
http://kernel.ubuntu.com/~jsalisbury/lp1781436
is for the wrong architecture (s390x instead of ppc64el).

Could you rebuild for ppc64el? Thanks

Sorry for that. There is a ppc64el kernel now posted:
http://kernel.ubuntu.com/~jsalisbury/lp1781436

------- Comment From <email address hidden> 2018-07-25 09:30 EDT-------
Thanks for the new kernel and modules.
I've tested it, and the bug is indeed fixed. Thanks!

SRU request submitted:
https://lists.ubuntu.com/archives/kernel-team/2018-July/094422.html

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-bionic' to 'verification-done-bionic'. If the problem still exists, change the tag 'verification-needed-bionic' to 'verification-failed-bionic'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

------- Comment From <email address hidden> 2018-08-08 04:31 EDT-------
I tested kernel 4.15.0-31-generic found in -proposed and tests passed. I also checked the source tree.

This bug was fixed in the package linux - 4.17.0-7.8

---------------
linux (4.17.0-7.8) cosmic; urgency=medium

  * linux: 4.17.0-7.8 -proposed tracker (LP: #1785242)

  * Cosmic update to 4.17.12 stable release (LP: #1785211)
    - spi: spi-s3c64xx: Fix system resume support
    - Input: elan_i2c - add ACPI ID for lenovo ideapad 330
    - Input: i8042 - add Lenovo LaVie Z to the i8042 reset list
    - Input: elan_i2c - add another ACPI ID for Lenovo Ideapad 330-15AST
    - mm: disallow mappings that conflict for devm_memremap_pages()
    - kvm, mm: account shadow page tables to kmemcg
    - delayacct: fix crash in delayacct_blkio_end() after delayacct init failure
    - tracing: Fix double free of event_trigger_data
    - tracing: Fix possible double free in event_enable_trigger_func()
    - kthread, tracing: Don't expose half-written comm when creating kthreads
    - tracing/kprobes: Fix trace_probe flags on enable_trace_kprobe() failure
    - tracing: Quiet gcc warning about maybe unused link variable
    - arm64: fix vmemmap BUILD_BUG_ON() triggering on !vmemmap setups
    - drm/i915/glk: Add Quirk for GLK NUC HDMI port issues.
    - mlxsw: spectrum_switchdev: Fix port_vlan refcounting
    - kcov: ensure irq code sees a valid area
    - mm: check for SIGKILL inside dup_mmap() loop
    - drm/amd/powerplay: Set higher SCLK&MCLK frequency than dpm7 in OD (v2)
    - xen/netfront: raise max number of slots in xennet_get_responses()
    - hv_netvsc: fix network namespace issues with VF support
    - skip LAYOUTRETURN if layout is invalid
    - ixgbe: Fix setting of TC configuration for macvlan case
    - ALSA: emu10k1: add error handling for snd_ctl_add
    - ALSA: fm801: add error handling for snd_ctl_add
    - NFSv4.1: Fix the client behaviour on NFS4ERR_SEQ_FALSE_RETRY
    - nfsd: fix error handling in nfs4_set_delegation()
    - nfsd: fix potential use-after-free in nfsd4_decode_getdeviceinfo
    - vfio: platform: Fix reset module leak in error path
    - vfio/mdev: Check globally for duplicate devices
    - vfio/type1: Fix task tracking for QEMU vCPU hotplug
    - kernel/hung_task.c: show all hung tasks before panic
    - mem_cgroup: make sure moving_account, move_lock_task and stat_cpu in the
      same cacheline
    - mm: /proc/pid/pagemap: hide swap entries from unprivileged users
    - mm: vmalloc: avoid racy handling of debugobjects in vunmap
    - mm/slub.c: add __printf verification to slab_err()
    - rtc: ensure rtc_set_alarm fails when alarms are not supported
    - rxrpc: Fix terminal retransmission connection ID to include the channel
    - perf tools: Fix pmu events parsing rule
    - netfilter: ipset: forbid family for hash:mac sets
    - netfilter: ipset: List timing out entries with "timeout 1" instead of zero
    - irqchip/ls-scfg-msi: Map MSIs in the iommu
    - watchdog: da9063: Fix updating timeout value
    - media: arch: sh: migor: Fix TW9910 PDN gpio
    - printk: drop in_nmi check from printk_safe_flush_on_panic()
    - bpf, arm32: fix inconsistent naming about emit_a32_lsr_{r64,i64}
    - ceph: fix alignment of rasize
    - ceph: fix use-after-free in ceph_statfs()
    - e1000e: Ignore TSYNCRXCTL when getting I219...

This bug was fixed in the package linux - 4.15.0-33.36

---------------
linux (4.15.0-33.36) bionic; urgency=medium

  * linux: 4.15.0-33.36 -proposed tracker (LP: #1787149)

  * RTNL assertion failure on ipvlan (LP: #1776927)
    - ipvlan: drop ipv6 dependency
    - ipvlan: use per device spinlock to protect addrs list updates
    - SAUCE: fix warning from "ipvlan: drop ipv6 dependency"

  * ubuntu_bpf_jit test failed on Bionic s390x systems (LP: #1753941)
    - test_bpf: flag tests that cannot be jited on s390

  * HDMI/DP audio can't work on the laptop of Dell Latitude 5495 (LP: #1782689)
    - drm/nouveau: fix nouveau_dsm_get_client_id()'s return type
    - drm/radeon: fix radeon_atpx_get_client_id()'s return type
    - drm/amdgpu: fix amdgpu_atpx_get_client_id()'s return type
    - platform/x86: apple-gmux: fix gmux_get_client_id()'s return type
    - ALSA: hda: use PCI_BASE_CLASS_DISPLAY to replace PCI_CLASS_DISPLAY_VGA
    - vga_switcheroo: set audio client id according to bound GPU id

  * locking sockets broken due to missing AppArmor socket mediation patches
    (LP: #1780227)
    - UBUNTU SAUCE: apparmor: fix apparmor mediating locking non-fs, unix sockets

  * Update2 for ocxl driver (LP: #1781436)
    - ocxl: Fix page fault handler in case of fault on dying process

  * netns: unable to follow an interface that moves to another netns
    (LP: #1774225)
    - net: core: Expose number of link up/down transitions
    - dev: always advertise the new nsid when the netns iface changes
    - dev: advertise the new ifindex when the netns iface changes

  * [Bionic] Disk IO hangs when using BFQ as io scheduler (LP: #1780066)
    - block, bfq: fix occurrences of request finish method's old name
    - block, bfq: remove batches of confusing ifdefs
    - block, bfq: add requeue-request hook

  * HP ProBook 455 G5 needs mute-led-gpio fixup (LP: #1781763)
    - ALSA: hda: add mute led support for HP ProBook 455 G5

  * [Bionic] bug fixes to improve stability of the ThunderX2 i2c driver
    (LP: #1781476)
    - i2c: xlp9xx: Fix issue seen when updating receive length
    - i2c: xlp9xx: Make sure the transfer size is not more than
      I2C_SMBUS_BLOCK_SIZE

  * x86/kvm: fix LAPIC timer drift when guest uses periodic mode (LP: #1778486)
    - x86/kvm: fix LAPIC timer drift when guest uses periodic mode

  * Please include ax88179_178a and r8152 modules in d-i udeb (LP: #1771823)
    - [Config:] d-i: Add ax88179_178a and r8152 to nic-modules

  * Nvidia fails after switching its mode (LP: #1778658)
    - PCI: Restore config space on runtime resume despite being unbound

  * Kernel error "task zfs:pid blocked for more than 120 seconds" (LP: #1781364)
    - SAUCE: (noup) zfs to 0.7.5-1ubuntu16.3

  * CVE-2018-12232
    - PATCH 1/1] socket: close race condition between sock_close() and
      sockfs_setattr()

  * CVE-2018-10323
    - xfs: set format back to extents if xfs_bmap_extents_to_btree

  * change front mic location for more lenovo m7/8/9xx machines (LP: #1781316)
    - ALSA: hda/realtek - Fix the problem of two front mics on more machines
    - ALSA: hda/realtek - two more lenovo models need fixup of MIC_LOCATION

  * Cephfs + fscache: unab...