linux-kernel - Re: [PATCH V2] iio: declare struct to fix warning

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Message-ID: <55C06F3D.5080803@windriver.com>
Date:	Tue, 4 Aug 2015 15:52:29 +0800
From:	Pengyu Ma <pengyu.ma@...driver.com>
To:	<jic23@...nel.org>, <linux-kernel@...r.kernel.org>,
	<linux-iio@...r.kernel.org>, <lars@...afoo.de>
Subject: Re: [PATCH V2] iio: declare struct to fix warning

If this patch is fine, could somebody help me to merge into upstream kernel?

Thanks,
Pengyu

On 08/03/2015 10:39 AM, Pengyu Ma wrote:
> When compile iio related driver the following warning shown:
>
> include/linux/iio/trigger.h:35:34: warning: 'struct iio_trigger'
> declared inside parameter list
>    int (*set_trigger_state)(struct iio_trigger *trig, bool state);
>
> include/linux/iio/trigger.h:38:18: warning: 'struct iio_dev'
> declared inside parameter list
>             struct iio_dev *indio_dev);
>
> 'struct iio_dev' and 'struct iio_trigger' was used before declaration,
> forward declaration for these structs to fix warning.
>
> Signed-off-by: Pengyu Ma <pengyu.ma@...driver.com>
> ---
>   include/linux/iio/trigger.h | 4 ++++
>   1 file changed, 4 insertions(+)
>
> diff --git a/include/linux/iio/trigger.h b/include/linux/iio/trigger.h
> index fa76c79..974cf73 100644
> --- a/include/linux/iio/trigger.h
> +++ b/include/linux/iio/trigger.h
> @@ -18,6 +18,10 @@ struct iio_subirq {
>   	bool enabled;
>   };
>   
> +/* forward declaration */
> +struct iio_dev;
> +struct iio_trigger;
> +
>   /**
>    * struct iio_trigger_ops - operations structure for an iio_trigger.
>    * @owner:		used to monitor usage count of the trigger.

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