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https://bugs.launchpad.net/bugs/1397928

Title:
  Feature: Add powernv-cpufreq upstream bug fixes to ubuntu-14.04.02
  kernel

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Utopic:
  Fix Released

Bug description:
  SRU Justification:
  [Impact]
  Users of ppc64el arches could have issues related to powernv-cpufreq.
  [Test Case]
  Ensure the pstate of various cpus respond properly after hotswapping/kexec/reboot events.
  [Fix]
  789ca24 cpufreq: Allow stop CPU callback to be used by all cpufreq drivers
  b120339 cpufreq: powernv: Set the pstate of the last hotplugged out cpu in policy->cpus to minimum
  cf30af76 cpufreq: powernv: Set the cpus to nominal frequency during reboot/kexec

  --

  Problem Description
  ===========================
  This is a feature request to include the following upstream(3.18) commits to Ubuntu-14.04.02 kernel.
  1)789ca2 cpufreq: Allow stop CPU callback to be used by all cpufreq drivers
  2)b12033 cpufreq: powernv: Set the pstate of the last hotplugged out cpu in policy->cpus to minimum
  3)cf30af cpufreq: powernv: Set the cpus to nominal frequency during reboot/kexec

  == Comment: #1 - Shilpasri G. Bhat <shigbhat@xxxxxxxxxx>  ==
  This patch was applied on top of  kernel(3.16) ubuntu-trusty/lts-backport-utopic
  (8bf5db16 UBUNTU: Ubuntu-lts-3.16.0-26.34~14.04.1)

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