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Subject[RFC PATCH V3 0/3] cpuidle: Cleanup pm_idle and include driver/cpuidle.c in-kernel
Date
V2 did not support architectures other than x86 that use pm_idle.
With this patch, architectures that use pm_idle (other than x86) can
continue to do so and co-exist. They can be incrementally converted
to directly call into cpuidle instead of pm_idle pointer.

Changes in V3:

* Re-arranged code in driver/cpuidle.c to allow non-x86 architectures
to continue to use pm-idle pointer until cpuidle.c is included into
the kernel for those architectures.

* This patch series tries to maintain pm_idle pointer for non-x86
archs so that the interface does not change at this point. These
archs can continue to set pm_idle=cpuidle_idle_call() if they want
to use cpuidle or stick to the present boot process.

* After wider review and testing we could incrementally convert other
archs (including arm, blackfin, cris, ia64, m32r, m68knommu,
microblaze, mn10300, sh, sparc) also to use cpuidle.c implicitly.

* This patch series applies on 2.6.37, and was tested on x86 system
with multiple sleep states. It was also compile tested on ARM,
boot tested on POWER6.

Goal:
This patch series tries to achieve the goal of having cpuidle manage
all idle routine for x86. It removes pm_idle function pointer which
causes problems discussed at http://lkml.org/lkml/2009/8/28/43 and
http://lkml.org/lkml/2009/8/28/50.

V1 of this series is at https://lkml.org/lkml/2010/10/19/449
and V2 is at https://lkml.org/lkml/2011/1/13/98

ToDo:
* Force default idle for xen in xen/setup.c
* This series applies on 2.6.37, would have to be rebased to
2.6.38-rc3

---
Trinabh Gupta (3):
cpuidle: default idle driver for x86
cpuidle: list based cpuidle driver registration and selection
cpuidle: Remove pm_idle pointer for x86


arch/x86/kernel/process.c | 340 -------------------------------
arch/x86/kernel/process_32.c | 4
arch/x86/kernel/process_64.c | 4
arch/x86/xen/setup.c | 1
drivers/acpi/processor_idle.c | 2
drivers/cpuidle/Kconfig | 9 +
drivers/cpuidle/cpuidle.c | 43 +++-
drivers/cpuidle/driver.c | 112 ++++++++++
drivers/idle/Makefile | 2
drivers/idle/default_driver.c | 453 +++++++++++++++++++++++++++++++++++++++++
include/linux/cpuidle.h | 3
11 files changed, 613 insertions(+), 360 deletions(-)
create mode 100644 drivers/idle/default_driver.c

--
Trinabh


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