linux-kernel - Re: [PATCH 1/2] gpio: move those interface depends on GPIOLIB into proper section

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Message-ID: <20121031071236.GA13393@localhost>
Date:	Wed, 31 Oct 2012 15:12:36 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Yuanhan Liu <yuanhan.liu@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org,
	Grant Likely <grant.likely@...retlab.ca>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH 1/2] gpio: move those interface depends on GPIOLIB into
 proper section

On Wed, Oct 31, 2012 at 03:00:54PM +0800, Yuanhan Liu wrote:
> There are 2 issues with current code:
> 
> 1. redefinition of 'gpio_cansleep':
> include/linux/gpio.h:60:19: error: redefinition of 'gpio_cansleep'
> include/asm-generic/gpio.h:212:19: note: previous definition of 'gpio_cansleep' was here
> 
> The root cause is include/linux/gpio.h has a defintion of it. And if
> CONFIG_GPIOLIB is not set, include/asm-generic/gpio.h has another
> definition.
> 
> 2. include/linux/gpio.h:62:2: error: implicit declaration of function '__gpio_cansleep'
> 
> Only happens when CONFIG_GPIOLIB is not set, too. Since it called
> gpiolib functions without putting something like: #ifdef CONFIG_GPIOLIB
> 
> So, move those functions into proper section at
> include/asm-generic/gpio.h would resolve 2 above issues.

The patch introduces new build errors:

yuanhan:gpio-fixes [2/2] db1a5a0 blackfin-BF526-EZBRD_defconfig

[error]
arch/blackfin/include/asm/gpio.h:197:19: error: redefinition of 'gpio_get_value'
arch/blackfin/include/asm/gpio.h:205:20: error: redefinition of 'gpio_set_value'
arch/blackfin/include/asm/gpio.h:213:19: error: redefinition of 'gpio_cansleep'
arch/blackfin/include/asm/gpio.h:218:19: error: redefinition of 'gpio_to_irq'

yuanhan:gpio-fixes [2/2] db1a5a0 blackfin-TCM-BF537_defconfig

[error]
include/asm-generic/gpio.h:225:19: error: redefinition of 'gpio_get_value'
include/asm-generic/gpio.h:231:20: error: redefinition of 'gpio_set_value'
include/asm-generic/gpio.h:242:19: error: redefinition of 'gpio_to_irq'

yuanhan:gpio-fixes [2/2] db1a5a0 sh-rsk7269_defconfig

[error]
arch/sh/include/asm/gpio.h:27:19: error: redefinition of 'gpio_get_value'
arch/sh/include/asm/gpio.h:32:20: error: redefinition of 'gpio_set_value'
arch/sh/include/asm/gpio.h:37:19: error: redefinition of 'gpio_cansleep'
arch/sh/include/asm/gpio.h:42:19: error: redefinition of 'gpio_to_irq'

yuanhan:gpio-fixes [2/2] db1a5a0 avr32-atngw100_defconfig

[error]
arch/avr32/mach-at32ap/include/mach/gpio.h:18: error: redefinition of 'gpio_get_value'
include/asm-generic/gpio.h:203: error: previous definition of 'gpio_get_value' was here
arch/avr32/mach-at32ap/include/mach/gpio.h:23: error: redefinition of 'gpio_set_value'
include/asm-generic/gpio.h:208: error: previous definition of 'gpio_set_value' was here
arch/avr32/mach-at32ap/include/mach/gpio.h:28: error: redefinition of 'gpio_cansleep'
include/asm-generic/gpio.h:213: error: previous definition of 'gpio_cansleep' was here
arch/avr32/mach-at32ap/include/mach/gpio.h:34: error: redefinition of 'gpio_to_irq'
include/asm-generic/gpio.h:218: error: previous definition of 'gpio_to_irq' was here

Thanks,
Fengguang
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