linux-kernel - [PATCH 0/2] ACPI / scan: Remove useless #ifndef and simplify container driver

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Date:	Fri, 08 Feb 2013 01:24:19 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Matthew Garrett <matthew.garrett@...ula.com>,
	Yinghai Lu <yinghai@...nel.org>, Jiang Liu <liuj97@...il.com>,
	Toshi Kani <toshi.kani@...com>,
	LKML <linux-kernel@...r.kernel.org>,
	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
Subject: [PATCH 0/2] ACPI / scan: Remove useless #ifndef and simplify container driver

On Monday, February 04, 2013 12:47:31 AM Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> 
> The only useful thing that the ACPI container driver does is to
> install system notify handlers for all container and module device
> objects it finds in the namespace.  The driver structure,
> acpi_container_driver, and the data structures created by its
> .add() callback are in fact not used by the driver, so remove
> them entirely.
> 
> It also makes a little sense to build that driver as a module,
> so make it non-modular and add its initialization to the
> namespace scanning code.
> 
> In addition to that, make the namespace walk callback used for
> installing the notify handlers more straightforward.

As pointed out by Toshi Kani, the above changes would make acpi_eject_store()
fail for containers and it is the only way to eject them currently, so patch
[2/2] is an improved version of this (with Toshi's changes folded in).

Patch [1/2] is just a cleanup removing a useless #ifndef from acpi_eject_store().

Thanks,
Rafael


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