Backport upstream bugfixes to ubuntu-16.04

[bugproxy]

Backport the below upstream "powernv-cpufreq" bug fixes to ubuntu 16.04:

The below listed patchset is accepted upstream and is in linux-next.

1) 86622cb8c57abb05fe95bea3a068949c0ca79fc3 cpufreq: powernv: Free 'chips' on module exit
2) 6d167a44e6c8da3316e037b788585fcf96112bea cpufreq: powernv: Hot-plug safe the kworker thread
3) 96c4726f01cdbf53acf74cf2394e287d74bf40a3 cpufreq: powernv: Remove cpu_to_chip_id() from hot-path
4) 0306e481d479a58eff17c27adf213fbb5822946b cpufreq: powernv/tracing: Add powernv_throttle tracepoint
5)c89f2682a39192433c296bf97b834fd2815a758b cpufreq: powernv: Replace pr_info with trace print for throttle event

Two more patches that are posted upstream:
6) http://marc.info/?l=linuxppc-embedded&m=145648325218686&w=2
7) http://marc.info/?l=linux-pm&m=145648316718658&w=2

1) Fixes a memory leak
2) Makes the worker thread hot-plug safe which is scheduled on an OCC event.
3) Fixes the below bug which cause 4% cpu overhead by powernv_cpufreq_throttle_check() function.
     4.44% [k] _raw_spin_lock_irqsave
            |
            |--48.56%-- _raw_spin_lock_irqsave
            | |
            | |--72.55%-- of_find_property
            | | |
            | | |--62.14%-- of_n_addr_cells
            | | | __of_find_n_match_cpu_property
            | | | |
            | | | |--75.72%-- of_get_cpu_node
            | | | | cpu_to_chip_id
            | | | | powernv_cpufreq_throttle_check
            | | | | powernv_cpufreq_target_index
            | | | | __cpufreq_driver_target
4) , 5) and 7) are permanent fixes for BZ 131119, BZ 130125 which complained on the throttle message reporting
6) Fixes bug in powernv_cpufreq_{init/exit}

[Tim Gardner (timg-tpi)]

I cherry-picked the first 5 patches from linux-next, but I'm not having much luck scraping 6 and 7 from marc.info.

[Tim Gardner (timg-tpi)]

Found and applied patch 6 at patchwork.ozlab.com. Patch 7 is gonna take a bit more work.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.4.0-13.29

---------------
linux (4.4.0-13.29) xenial; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
    - LP: #1556247

  * s390/mm: four page table levels vs. fork (LP: #1556141)
    - s390/mm: four page table levels vs. fork

  * [Hyper-V] network performance patches for Xenial 16.04 (LP: #1556037)
    - hv_netvsc: use skb_get_hash() instead of a homegrown implementation
    - hv_netvsc: cleanup netdev feature flags for netvsc

  * fails to boot on megaraid (LP: #1552903)
    - SAUCE: (noup) megaraid_sas: Don't issue kill adapter for MFI controllers in
      case of PD list DCMD failure

  * ALSA: hda - add codec support for Kabylake display audio codec (LP: #1556002)
    - ALSA: hda - add codec support for Kabylake display audio codec

  * Backport upstream bugfixes to ubuntu-16.04 (LP: #1555765)
    - cpufreq: powernv: Free 'chips' on module exit
    - cpufreq: powernv: Hot-plug safe the kworker thread
    - cpufreq: powernv: Remove cpu_to_chip_id() from hot-path
    - cpufreq: powernv/tracing: Add powernv_throttle tracepoint
    - cpufreq: powernv: Replace pr_info with trace print for throttle event
    - SAUCE: (noup) cpufreq: powernv: Fix bugs in powernv_cpufreq_{init/exit}

  * Linux netfilter IPT_SO_SET_REPLACE memory corruption (LP: #1555338)
    - SAUCE: [nf,v2] netfilter: x_tables: don't rely on well-behaving userspace

  * integer overflow in xt_alloc_table_info (LP: #1555353)
    - SAUCE: (noup) netfilter: x_tables: check for size overflow

  * linux: auto-generate the reconstruct information from the git tag (LP: #1555543)
    - [Packaging] reconstruct -- automatically reconstruct against base tag
    - [Config] reconstruct -- update to autoreconstruct output
    - [Packaging] reconstruct -- update when inserting final changes

  * Xenial update to v4.4.5 stable release (LP: #1555640)
    - use ->d_seq to get coherency between ->d_inode and ->d_flags
    - drivers: sh: Restore legacy clock domain on SuperH platforms
    - Btrfs: fix deadlock running delayed iputs at transaction commit time
    - btrfs: Fix no_space in write and rm loop
    - btrfs: async-thread: Fix a use-after-free error for trace
    - block: Initialize max_dev_sectors to 0
    - PCI: keystone: Fix MSI code that retrieves struct pcie_port pointer
    - parisc: Fix ptrace syscall number and return value modification
    - mips/kvm: fix ioctl error handling
    - kvm: x86: Update tsc multiplier on change.
    - fbcon: set a default value to blink interval
    - cifs: fix out-of-bounds access in lease parsing
    - CIFS: Fix SMB2+ interim response processing for read requests
    - Fix cifs_uniqueid_to_ino_t() function for s390x
    - vfio: fix ioctl error handling
    - KVM: x86: fix root cause for missed hardware breakpoints
    - arm/arm64: KVM: Fix ioctl error handling
    - iommu/amd: Apply workaround for ATS write permission check
    - iommu/amd: Fix boot warning when device 00:00.0 is not iommu covered
    - iommu/vt-d: Use BUS_NOTIFY_REMOVED_DEVICE in hotplug path
    - target: Fix WRITE_SAME/DISCARD conversion to linux 512b sectors
    - drm/ast: Fix incorrect register check for DRAM width
    - d...

[bugproxy (bugproxy)]

------- Comment From <email address hidden> 2016-04-07 09:57 EDT-------
(In reply to comment #12)
> Hi,
>
> Below commits are now upstream and needs to be backported:
>
> 1) 3e5963bc343b3fb4ca045e9d1c14cb9ce89234b8 cpufreq: powernv: Define per_cpu
> chip pointer to optimize hot-path
>
> 2)edd4a893e097d744e8069acf585f8b02dbbc9134 Revert "cpufreq: postfix policy
> directory with the first CPU in related_cpus"
>
> 3) 1b0289848d5dcea74a6e5115d6c9892b0dbe9c8f cpufreq: powernv: Add sysfs
> attributes to show throttle stats
>
> Should I open a new bug to backport these commits? Please advise.
>
> Thanks and Regards,
> Shilpa

Making this comment external.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.4.0-21.37

---------------
linux (4.4.0-21.37) xenial; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
    - LP: #1571791

  * linux: MokSBState is ignored (LP: #1571691)
    - SAUCE: (noup) MODSIGN: Import certificates from UEFI Secure Boot
    - SAUCE: (noup) efi: Disable secure boot if shim is in insecure mode
    - SAUCE: (noup) Display MOKSBState when disabled

linux (4.4.0-20.36) xenial; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
    - LP: #1571069

  * sysfs mount failure during stateful lxd snapshots (LP: #1570906)
    - SAUCE: kernfs: Do not match superblock in another user namespace when
      mounting

  * Kernel Panic in Ubuntu 16.04 netboot installer (LP: #1570441)
    - x86/topology: Fix logical package mapping
    - x86/topology: Fix Intel HT disable
    - x86/topology: Use total_cpus not nr_cpu_ids for logical packages
    - xen/apic: Provide Xen-specific version of cpu_present_to_apicid APIC op
    - x86/topology: Fix AMD core count

  * [regression]: Failed to call clock_adjtime(): Invalid argument
    (LP: #1566465)
    - ntp: Fix ADJ_SETOFFSET being used w/ ADJ_NANO

linux (4.4.0-19.35) xenial; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
    - LP: #1570348

  * CVE-2016-2847 (LP: #1554260)
    - pipe: limit the per-user amount of pages allocated in pipes

  * xenial kernel crash on HP BL460c G7 (qla24xx problem?) (LP: #1554003)
    - SAUCE: (noup) qla2xxx: Add irq affinity notification V2

  * arm64: guest hangs when ntpd is running (LP: #1549494)
    - SAUCE: (noup) KVM: arm/arm64: Handle forward time correction gracefully

  * linux: Enforce signed module loading when UEFI secure boot (LP: #1566221)
    - [Config] CONFIG_EFI_SECURE_BOOT_SIG_ENFORCE=y

  * s390/cpumf: Fix lpp detection (LP: #1555344)
    - s390/facilities: use stfl mnemonic instead of insn magic
    - s390/facilities: always use lowcore's stfle field for storing facility bits
    - s390/cpumf: Fix lpp detection

  * s390x kernel image needs weightwatchers (LP: #1536245)
    - [Config] s390x: Use compressed kernel bzImage

  * Surelock GA2 SP1: surelock02p05: Not seeing sgX devices for LUNs after
    upgrading to Ubuntu 16.04 (LP: #1567581)
    - Revert "UBUNTU: SAUCE: (noup) powerpc/pci: Assign fixed PHB number based on
      device-tree properties"

  * Backport upstream bugfixes to ubuntu-16.04 (LP: #1555765)
    - cpufreq: powernv: Define per_cpu chip pointer to optimize hot-path
    - Revert "cpufreq: postfix policy directory with the first CPU in related_cpus"
    - cpufreq: powernv: Add sysfs attributes to show throttle stats

  * systemd-modules-load.service: Failing due to missing module 'ib_iser' (LP: #1566468)
    - [Config] Add ib_iser to generic inclusion list

  * thunderx nic performance improvements (LP: #1567093)
    - net: thunderx: Set recevie buffer page usage count in bulk
    - net: thunderx: Adjust nicvf structure to reduce cache misses

  * fixes for thunderx nic in multiqueue mode (LP: #1567091)
    - net: thunderx: Fix for multiqset not configured upon interface toggle
    - net: thunderx: Fix for HW TSO not enabled for secondary qsets
    - net: thund...