linux-kernel - Re: [PATCH v2 0/9] cpuidle: rework device state count handling

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Date:	Mon, 06 Jan 2014 13:12:16 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:	daniel.lezcano@...aro.org, lenb@...nel.org,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	kyungmin.park@...sung.com
Subject: Re: [PATCH v2 0/9] cpuidle: rework device state count handling

On Friday, December 20, 2013 07:47:22 PM Bartlomiej Zolnierkiewicz wrote:
> Hi,
> 
> Some cpuidle drivers assume that cpuidle core will handle cases where
> device->state_count is smaller than driver->state_count, unfortunately
> currently this is untrue (device->state_count is used only for handling
> cpuidle state sysfs entries and driver->state_count is used for all
> other cases) and will not be fixed in the future as device->state_count
> is planned to be removed [1].
> 
> This patchset fixes such drivers (ARM EXYNOS cpuidle driver and ACPI
> cpuidle driver), removes superflous device->state_count initialization
> from drivers for which device->state_count equals driver->state_count
> (POWERPC pseries cpuidle driver and intel_idle driver) and finally
> removes state_count field from struct cpuidle_device.
> 
> Additionaly (while at it) this patchset fixes C1E promotion disable
> quirk handling (in intel_idle driver) and converts cpuidle drivers code
> to use the common cpuidle_[un]register() routines (in POWERPC pseries
> cpuidle driver and intel_idle driver).
> 
> [1] http://permalink.gmane.org/gmane.linux.power-management.general/36908
> 
> Reference to v1:
> 	http://comments.gmane.org/gmane.linux.power-management.general/37390
> 
> Changes since v1:
> - synced patch series with next-20131220
> - added ACKs from Daniel Lezcano

I've queued up the series for 3.14, thanks!

> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
> 
> 
> Bartlomiej Zolnierkiewicz (9):
>   ARM: EXYNOS: cpuidle: fix AFTR mode check
>   POWERPC: pseries: cpuidle: remove superfluous dev->state_count
>     initialization
>   POWERPC: pseries: cpuidle: use the common cpuidle_[un]register()
>     routines
>   ACPI / cpuidle: fix max idle state handling with hotplug CPU support
>   ACPI / cpuidle: remove dev->state_count setting
>   intel_idle: do C1E promotion disable quirk for hotplugged CPUs
>   intel_idle: remove superfluous dev->state_count initialization
>   intel_idle: use the common cpuidle_[un]register() routines
>   cpuidle: remove state_count field from struct cpuidle_device
> 
>  arch/arm/mach-exynos/cpuidle.c                  |   8 +-
>  arch/powerpc/platforms/pseries/processor_idle.c |  59 +---------
>  drivers/acpi/processor_idle.c                   |  29 +++--
>  drivers/cpuidle/cpuidle.c                       |   3 -
>  drivers/cpuidle/sysfs.c                         |   5 +-
>  drivers/idle/intel_idle.c                       | 140 +++++-------------------
>  include/linux/cpuidle.h                         |   1 -
>  7 files changed, 51 insertions(+), 194 deletions(-)
> 
> 

-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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