linux-kernel - Re: [PATCH 2/2 v2, RFC] Driver core: Introduce offline/online callbacks for memory blocks

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Date:	Mon, 6 May 2013 10:20:44 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Toshi Kani <toshi.kani@...com>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	isimatu.yasuaki@...fujitsu.com,
	vasilis.liaskovitis@...fitbricks.com, Len Brown <lenb@...nel.org>,
	linux-mm@...ck.org
Subject: Re: [PATCH 2/2 v2, RFC] Driver core: Introduce offline/online
 callbacks for memory blocks

On Sat, May 04, 2013 at 01:21:16PM +0200, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> 
> Introduce .offline() and .online() callbacks for memory_subsys
> that will allow the generic device_offline() and device_online()
> to be used with device objects representing memory blocks.  That,
> in turn, allows the ACPI subsystem to use device_offline() to put
> removable memory blocks offline, if possible, before removing
> memory modules holding them.
> 
> The 'online' sysfs attribute of memory block devices will attempt to
> put them offline if 0 is written to it and will attempt to apply the
> previously used online type when onlining them (i.e. when 1 is
> written to it).
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> ---
>  drivers/base/memory.c  |  105 +++++++++++++++++++++++++++++++++++++------------
>  include/linux/memory.h |    1 
>  2 files changed, 81 insertions(+), 25 deletions(-)

Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
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