linux-kernel - Re: In function `ata_acpi_associate': undefined reference to `register_hotplug_dock

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Date:	Mon, 17 Mar 2008 23:57:53 -0400
From:	Len Brown <lenb@...nel.org>
To:	Thomas Meyer <thomas@...3r.de>,
	Kristen Carlson Accardi <kristen.c.accardi@...el.com>,
	linux-acpi@...r.kernel.org
Cc:	Adrian Bunk <bunk@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	htejun@...il.com, jeff@...zik.org
Subject: Re: In function `ata_acpi_associate': undefined reference to	`register_hotplug_dock_device'

> drivers/built-in.o: In function `ata_acpi_associate':
> (.text+0x7106a): undefined reference to `register_hotplug_dock_device'

CONFIG_ACPI_DOCK=m
CONFIG_ATA_ACPI=y

don't work together.

particularly this:

drivers/ata/libata-acpi.c
...
#if defined(CONFIG_ACPI_DOCK) || defined(CONFIG_ACPI_DOCK_MODULE)
                        /* we might be on a docking station */
                        register_hotplug_dock_device(ap->acpi_handle,
                                                     ata_acpi_ap_notify, ap);
#endif

does not link with an EXPORT_SYMBOL_GPL in dock.c when that is a module.

you can change them both to be =y (or either to be =n) to work around it.
however, this is a 2.6.25 regression, since 2.6.24 could make ATA=y
and make dock=m

-Len
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