linux-kernel - Re: [PATCH 4/8] vfio/mdev: Drop redundant extern for exported symbols

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Date:   Tue, 26 Mar 2019 00:37:04 +0530
From:   Kirti Wankhede <kwankhede@...dia.com>
To:     Parav Pandit <parav@...lanox.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "alex.williamson@...hat.com" <alex.williamson@...hat.com>
Subject: Re: [PATCH 4/8] vfio/mdev: Drop redundant extern for exported symbols



On 3/23/2019 4:50 AM, Parav Pandit wrote:
> There is no need use 'extern' for exported functions.
> 
> Signed-off-by: Parav Pandit <parav@...lanox.com>
> ---
>  include/linux/mdev.h | 21 ++++++++++-----------
>  1 file changed, 10 insertions(+), 11 deletions(-)
> 
> diff --git a/include/linux/mdev.h b/include/linux/mdev.h
> index b6e048e..0924c48 100644
> --- a/include/linux/mdev.h
> +++ b/include/linux/mdev.h
> @@ -118,21 +118,20 @@ struct mdev_driver {
>  
>  #define to_mdev_driver(drv)	container_of(drv, struct mdev_driver, driver)
>  
> -extern void *mdev_get_drvdata(struct mdev_device *mdev);
> -extern void mdev_set_drvdata(struct mdev_device *mdev, void *data);
> -extern uuid_le mdev_uuid(struct mdev_device *mdev);
> +void *mdev_get_drvdata(struct mdev_device *mdev);
> +void mdev_set_drvdata(struct mdev_device *mdev, void *data);
> +uuid_le mdev_uuid(struct mdev_device *mdev);
>  
>  extern struct bus_type mdev_bus_type;
>  
> -extern int  mdev_register_device(struct device *dev,
> -				 const struct mdev_parent_ops *ops);
> -extern void mdev_unregister_device(struct device *dev);
> +int mdev_register_device(struct device *dev, const struct mdev_parent_ops *ops);
> +void mdev_unregister_device(struct device *dev);
>  
> -extern int  mdev_register_driver(struct mdev_driver *drv, struct module *owner);
> -extern void mdev_unregister_driver(struct mdev_driver *drv);
> +int mdev_register_driver(struct mdev_driver *drv, struct module *owner);
> +void mdev_unregister_driver(struct mdev_driver *drv);
>  
> -extern struct device *mdev_parent_dev(struct mdev_device *mdev);
> -extern struct device *mdev_dev(struct mdev_device *mdev);
> -extern struct mdev_device *mdev_from_dev(struct device *dev);
> +struct device *mdev_parent_dev(struct mdev_device *mdev);
> +struct device *mdev_dev(struct mdev_device *mdev);
> +struct mdev_device *mdev_from_dev(struct device *dev);
>  
>  #endif /* MDEV_H */
> 

Adding 'extern' to exported symbols is inline to other exported
functions from device's core module like device_register(),
device_unregister(), get_device(), put_device()

Thanks,
Kirti