linux-kernel - Re: [PATCH] of: export of_get_next

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Message-ID: <CACVXFVMuUn=0LLWxJO62gp6uugNej-kwC0k_LMGWozGRxcx6Vg@mail.gmail.com>
Date:	Sun, 21 Apr 2013 20:11:58 +0800
From:	Ming Lei <ming.lei@...onical.com>
To:	linux-kernel@...r.kernel.org
Cc:	Ming Lei <ming.lei@...onical.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	devicetree-discuss@...ts.ozlabs.org
Subject: Re: [PATCH] of: export of_get_next_parent

Hi,

On Wed, Apr 10, 2013 at 5:47 PM, Ming Lei <ming.lei@...onical.com> wrote:
> The function is called by at least three drivers now:
>
>         pinctrl
>         mfd/vexpress
>         v4l2-core
>
> The 3rd one can be built as module, so export the function to
> avoid build failure.
>
> Cc: Grant Likely <grant.likely@...retlab.ca>
> Cc: Rob Herring <rob.herring@...xeda.com>
> Cc: devicetree-discuss@...ts.ozlabs.org
> Signed-off-by: Ming Lei <ming.lei@...onical.com>
> ---
>  drivers/of/base.c |    1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/of/base.c b/drivers/of/base.c
> index c6443de..a2a0ddc 100644
> --- a/drivers/of/base.c
> +++ b/drivers/of/base.c
> @@ -382,6 +382,7 @@ struct device_node *of_get_next_parent(struct device_node *node)
>         raw_spin_unlock_irqrestore(&devtree_lock, flags);
>         return parent;
>  }
> +EXPORT_SYMBOL(of_get_next_parent);

Gentle ping.

Without the patch, the below build failure is produced every time on -next tree:

  Building modules, stage 2.
  MODPOST 72 modules
ERROR: "of_get_next_parent" [drivers/media/v4l2-core/videodev.ko] undefined!
make[1]: *** [__modpost] Error 1
make: *** [modules] Error 2
install kernel and modules


Thanks,
--
Ming Lei
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