linux-kernel - [build bug] uvc_status_cleanup(): undefined reference to `input_unregister

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Message-ID: <20090208145835.GA1649@elte.hu>
Date:	Sun, 8 Feb 2009 15:58:35 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	linux-kernel@...r.kernel.org,
	Laurent Pinchart <laurent.pinchart@...net.be>,
	Mauro Carvalho Chehab <mchehab@...hat.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: [build bug] uvc_status_cleanup(): undefined reference to
	`input_unregister_device'


Hi, havent seen this reported on lkml yet.

-tip testing found that certain (user-reachable) Kconfig combinations
can cause this build failure on latest mainline:

 drivers/built-in.o: In function `uvc_status_cleanup':
 (.text+0x221cca): undefined reference to `input_unregister_device'
 drivers/built-in.o: In function `uvc_status_init':
 (.text+0x221d4c): undefined reference to `input_allocate_device'
 drivers/built-in.o: In function `uvc_status_init':
 (.text+0x221db3): undefined reference to `input_free_device'
 drivers/built-in.o: In function `uvc_status_init':
 (.text+0x221ec6): undefined reference to `input_register_device'
 drivers/built-in.o: In function `uvc_status_complete':
 uvc_status.c:(.text+0x2222ec): undefined reference to `input_event'

triggered on v2.6.29-rc3-697-gae1a25d. The problem is this combination:

 CONFIG_INPUT=m
 CONFIG_USB_VIDEO_CLASS=y
 CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV=y

Thanks,

	Ingo

View attachment "config" of type "text/plain" (44882 bytes)