linux-kernel - Re: [PATCH 1/5] imx-drm: imx-drm-core: Export imx_drm_encoder_get_mux

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Date:	Fri, 28 Jun 2013 09:29:50 +0200
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	Fabio Estevam <festevam@...il.com>
Cc:	gregkh@...uxfoundation.org, shawn.guo@...aro.org,
	kernel@...gutronix.de, linux-kernel@...r.kernel.org,
	Fabio Estevam <fabio.estevam@...escale.com>
Subject: Re: [PATCH 1/5] imx-drm: imx-drm-core: Export
 imx_drm_encoder_get_mux_id

On Fri, Jun 28, 2013 at 12:32:01AM -0300, Fabio Estevam wrote:
> From: Fabio Estevam <fabio.estevam@...escale.com>
> 
> When building imx_v6_v7_defconfig with imx-drm drivers selected as modules, we 
> get the following build error:
> 
> ERROR: "imx_drm_encoder_get_mux_id" [drivers/staging/imx-drm/imx-ldb.ko] undefined!
So imx-ldb.c needs a symbol from imx-drm-core.c right? The alternative
to exporting this symbol for a single user(?) is to link these two files
into a single module. Does this make sense? If yes, that would IMHO be
the better fix.

Best regards
Uwe
> 
> Export the required function to avoid this problem.
> 
> Signed-off-by: Fabio Estevam <fabio.estevam@...escale.com>
> ---
>  drivers/staging/imx-drm/imx-drm-core.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/staging/imx-drm/imx-drm-core.c b/drivers/staging/imx-drm/imx-drm-core.c
> index 9854a1d..6bc205b 100644
> --- a/drivers/staging/imx-drm/imx-drm-core.c
> +++ b/drivers/staging/imx-drm/imx-drm-core.c
> @@ -678,6 +678,7 @@ found:
>  
>  	return i;
>  }
> +EXPORT_SYMBOL_GPL(imx_drm_encoder_get_mux_id);
>  
>  /*
>   * imx_drm_remove_encoder - remove an encoder
> -- 
> 1.8.1.2
> 
> 

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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