[SRU][Artful][Bionic][PATCH 0/2] Fixes for LP:1743269

[Joseph Salisbury]

BugLink: http://bugs.launchpad.net/bugs/1743269

== SRU Justification ==
Commits b29c6ef7bb12 and 7d5905dc14a8 fix a regression in Artful.  They 
were both added to mainline in v4.15-rc1 and fix the following two commits:
b29c6ef7bb12 Fixes: 4815d3c56d1e (cpufreq: x86: Make scaling_cur_freq behave more as expected)
7d5905dc14a8 Fixes: 890da9cf0983 (Revert "x86: do not use cpufreq_quick_get() for /proc/cpuinfo "cpu MHz"")  
According to the bug report, P-state is not working in Artful, but it was working 
in Zesty.  This bug is happening on a Lenovo Thinkpad X230 with an Intel Core i5-3210M CPU.
The bug reporter is using CPU scaling to improve battery life. 

== Fixes ==
b29c6ef7bb12 ("x86 / CPU: Avoid unnecessary IPIs in arch_freq_get_on_cpu()")
7d5905dc14a8 ("x86 / CPU: Always show current CPU frequency in /proc/cpuinfo")

== Regression Potential ==
Low.  The two commit fix a current regression and have had additiona upstream reviews
from being send to stable.

== Test Case ==
A test kernel was built with this patch and tested by the original bug reporter.
The bug reporter states the test kernel resolved the bug.
Rafael J. Wysocki (2):
  x86 / CPU: Avoid unnecessary IPIs in arch_freq_get_on_cpu()
  x86 / CPU: Always show current CPU frequency in /proc/cpuinfo

 arch/x86/kernel/cpu/Makefile     |  2 +-
 arch/x86/kernel/cpu/aperfmperf.c | 71 +++++++++++++++++++++++++++++-----------
 arch/x86/kernel/cpu/cpu.h        |  3 ++
 arch/x86/kernel/cpu/proc.c       |  6 +++-
 fs/proc/cpuinfo.c                |  6 ++++
 include/linux/cpufreq.h          |  1 +
 6 files changed, 68 insertions(+), 21 deletions(-)

-- 
2.7.4