linux-kernel - Re: [PATCH 1/2] device: Add dev_of

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Message-ID: <CAL_Jsq+DVWQLVeA6qYZRSEZsk-gQHtktWcTFs=0hvkQtZutZCg@mail.gmail.com>
Date:	Tue, 17 Feb 2015 19:03:41 -0600
From:	Rob Herring <robherring2@...il.com>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Grant Likely <grant.likely@...aro.org>,
	Olof Johansson <olof@...om.net>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH 1/2] device: Add dev_of_node() accessor

+Greg KH

On Sun, Feb 15, 2015 at 9:59 PM, Benjamin Herrenschmidt
<benh@...nel.crashing.org> wrote:
> Suggested by Arnd Bergmann, this gives a practical accessor for
> the of_node field of struct device while instructing the compiler
> that it will be NULL if CONFIG_OF is not set.
>
> Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> ---

I'll let Greg take this with the other patch:

Acked-by: Rob Herring <robh@...nel.org>

>
> This is what we discussed back in November and I had forgotten
> to finish :)
>
>  include/linux/device.h | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/include/linux/device.h b/include/linux/device.h
> index fb50673..08128288 100644
> --- a/include/linux/device.h
> +++ b/include/linux/device.h
> @@ -916,6 +916,13 @@ static inline void device_lock_assert(struct device *dev)
>         lockdep_assert_held(&dev->mutex);
>  }
>
> +static inline struct device_node *dev_of_node(struct device *dev)
> +{
> +       if (!IS_ENABLED(CONFIG_OF))
> +               return NULL;
> +       return dev->of_node;
> +}
> +
>  void driver_init(void);
>
>  /*
>
>
>
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