From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Date: Wed, 8 May 2013 12:18:37 +0000 (+0200)
Subject: Driver core: Introduce offline/online callbacks for memory blocks
X-Git-Tag: omap-for-v3.11/fixes-for-merge-window~19^2~19^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4960e05e22604ee270a023f968e0e4f9bd0c6fef;p=pandora-kernel.git

Driver core: Introduce offline/online callbacks for memory blocks

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@intel.com>
Tested-by: Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Toshi Kani <toshi.kani@hp.com>
---

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