linux-kernel - Re: [PATCH v2 0/4] Unify CPU hotplug lock interface

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Date:	Fri, 30 Aug 2013 11:44:06 +0900
From:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
To:	Toshi Kani <toshi.kani@...com>
CC:	<rjw@...k.pl>, <mingo@...hat.com>, <hpa@...ux.intel.com>,
	<tglx@...utronix.de>, <gregkh@...uxfoundation.org>,
	<benh@...nel.crashing.org>, <linux-acpi@...r.kernel.org>,
	<x86@...nel.org>, <linuxppc-dev@...ts.ozlabs.org>,
	<linux-kernel@...r.kernel.org>, <nfont@...ux.vnet.ibm.com>,
	<fenghua.yu@...el.com>, <bp@...e.de>,
	<srivatsa.bhat@...ux.vnet.ibm.com>
Subject: Re: [PATCH v2 0/4] Unify CPU hotplug lock interface

(2013/08/30 9:22), Toshi Kani wrote:
> lock_device_hotplug() was recently introduced to serialize CPU & Memory
> online/offline and hotplug operations, along with sysfs online interface
> restructure (commit 4f3549d7).  With this new locking scheme,
> cpu_hotplug_driver_lock() is redundant and is no longer necessary.
> 
> This patchset makes sure that lock_device_hotplug() covers all CPU online/
> offline interfaces, and then removes cpu_hotplug_driver_lock().
> 
> v2:
>   - Rebased to the pm tree, bleeding-edge.
>   - Changed patch 2/4 to use lock_device_hotplug_sysfs().
> 
> ---
> Toshi Kani (4):
>    hotplug, x86: Fix online state in cpu0 debug interface
>    hotplug, x86: Add hotplug lock to missing places
>    hotplug, x86: Disable ARCH_CPU_PROBE_RELEASE on x86
>    hotplug, powerpc, x86: Remove cpu_hotplug_driver_lock()
> 
> ---
The patch-set looks good to me.

Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>

Thanks,
Yasuaki Ishimatsu


>   arch/powerpc/kernel/smp.c              | 12 ----------
>   arch/powerpc/platforms/pseries/dlpar.c | 40 +++++++++++++---------------------
>   arch/x86/Kconfig                       |  4 ----
>   arch/x86/kernel/smpboot.c              | 21 ------------------
>   arch/x86/kernel/topology.c             | 11 ++++++----
>   drivers/base/cpu.c                     | 34 +++++++++++++++++++----------
>   include/linux/cpu.h                    | 13 -----------
>   7 files changed, 45 insertions(+), 90 deletions(-)
> 


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