linux-kernel - Re: [PATCH v2 01/10] ARM: NUC900: Add nuc970 machine support

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Date:	Mon, 11 Jul 2016 18:04:35 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Wan Zongshun <vw@...mu.org>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Russell King <linux@...linux.org.uk>,
	devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, robh@...nel.org,
	jason@...edaemon.net, p.zabel@...gutronix.de,
	Wan Zongshun <mcuos.com@...il.com>
Subject: Re: [PATCH v2 01/10] ARM: NUC900: Add nuc970 machine support

On Sunday, July 10, 2016 3:27:21 PM CEST Wan Zongshun wrote:
> +ifeq ($(CONFIG_SOC_NUC970),)
>  obj-y                          := irq.o time.o mfp.o gpio.o clock.o
>  obj-y                          += clksel.o dev.o cpu.o
> +endif
>  # W90X900 CPU support files

When mfp.o is disabled like this, I get a link error in two drivers
using the exported interface:

ERROR: "mfp_set_groupg" [drivers/spi/spi-nuc900.ko] undefined!
ERROR: "mfp_set_groupi" [drivers/input/keyboard/w90p910_keypad.ko] undefined!

Any idea for a better migration strategy?

	Arnd