linux-kernel - [PATCH v2 0/7] Cpufreq, cpu hotplug, suspend/resume related fixes

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Message-ID: <20130729225213.20863.56722.stgit@srivatsabhat.in.ibm.com>
Date:	Tue, 30 Jul 2013 04:23:12 +0530
From:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
To:	rjw@...k.pl, viresh.kumar@...aro.org, toralf.foerster@....de,
	robert.jarzmik@...el.com, durgadoss.r@...el.com,
	tianyu.lan@...el.com, lantianyu1986@...il.com,
	dirk.brandewie@...il.com
Cc:	stern@...land.harvard.edu, srivatsa.bhat@...ux.vnet.ibm.com,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/7] Cpufreq, cpu hotplug, suspend/resume related fixes

Hi,

This patchset reorganizes the cpufreq code and preserves the file permissions
of cpufreq-related per-cpu sysfs files across suspend/resume cycles, by
performing a light-weight init/teardown in those paths.

Patches 1 - 4 reorganize the code and have no functional impact, and can go
in as general cleanups as well. This reorganization builds a base that the
rest of the patches will make use of.

Patch 5 and 6 add a mechanism to perform light-weight init/tear-down of CPUs
in the cpufreq subsystem and finally patch 7 uses it to preserve sysfs files
across suspend/resume.

All the patches apply on Rafael's bleeding-edge branch on linux-pm git
tree[1].

Changes in v2:
* Fixed a refcounting bug explained here:
  http://marc.info/?l=linux-kernel&m=137511192600806&w=2

* Addressed some suggestions about code reorganization received in v1.
* Rebased on top of the bleeding-edge branch.

[1]. git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git bleeding-edge

Thank you very much!

 Srivatsa S. Bhat (7):
      cpufreq: Fix misplaced call to cpufreq_update_policy()
      cpufreq: Add helper to perform alloc/free of policy structure
      cpufreq: Extract non-interface related stuff from cpufreq_add_dev_interface
      cpufreq: Extract the handover of policy cpu to a helper function
      cpufreq: Introduce a flag ('frozen') to separate full vs temporary init/teardown
      cpufreq: Preserve policy structure across suspend/resume
      cpufreq: Perform light-weight init/teardown during suspend/resume

 drivers/cpufreq/cpufreq.c       |  303 ++++++++++++++++++++++++++-------------
 drivers/cpufreq/cpufreq_stats.c |    8 -
 2 files changed, 205 insertions(+), 106 deletions(-)

Thanks,
Srivatsa S. Bhat
IBM Linux Technology Center

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