linux-kernel - Re: [PATCH] mfd: syscon: Include linux/err.h to fix build error

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Date:	Fri, 9 May 2014 12:15:13 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Tushar Behera <tushar.behera@...aro.org>
Cc:	linux-kernel@...r.kernel.org, sameo@...ux.intel.com,
	peter.chen@...escale.com
Subject: Re: [PATCH] mfd: syscon: Include linux/err.h to fix build error

On Fri, 09 May 2014, Tushar Behera wrote:

> commit df73de9b0d412 ("mfd: syscon: Return -ENOSYS if CONFIG_MFD_SYSCON
> is not enabled") introduced fallbacks for APIs, but missed out on adding
> the header file. This would work only if linux/err.h is also included
> in the source code from where this file is included. It would be better
> to include linux/err.h in file to remove possible build errors.
> 
> Without this patch, we get following and similar build errors if this
> header file is included in some source file and CONFIG_MFD_SYSCON is
> not enabled.
> 
> include/linux/mfd/syscon.h: In function ‘syscon_node_to_regmap’:
> include/linux/mfd/syscon.h:30:2: error: implicit declaration of function ‘ERR_PTR’ [-Werror=implicit-function-declaration]
>   return ERR_PTR(-ENOSYS);
>   ^
> include/linux/mfd/syscon.h:30:18: error: ‘ENOSYS’ undeclared (first use in this function)
>   return ERR_PTR(-ENOSYS);
>                   ^
> 
> Signed-off-by: Tushar Behera <tushar.behera@...aro.org>
> ---
>  include/linux/mfd/syscon.h |    2 ++
>  1 file changed, 2 insertions(+)

Applied, thanks.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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