Subject: Re: [PATCH] virtio: fix virtio_config_ops kerneldocs

From: Bagas Sanjaya <[email-masked]>
Date: Tue, 20 Dec 2022 16:12:22 +0700

On Tue, Dec 20, 2022 at 08:37:09AM +0100, Ricardo Cañuelo wrote:
> Fixes two warning messages when building htmldocs:
> 
>     warning: duplicate section name 'Note'
>     warning: expecting prototype for virtio_config_ops().
>              Prototype was for vq_callback_t() instead
> 

Describe the steps needed to fix both warnings above. I see in the diff that:

  * move vq_callback_t() declaration above;
  * match entity type of virtio_config_ops; and
  * reformat @finalize_features description.

> Signed-off-by: Ricardo Cañuelo <[email-masked]>

You need to add appropriate tags:

Link: https://lore.kernel.org/linux-next/[email-masked]/
Fixes: 333723e8bc393d ("docs: driver-api: virtio: virtio on Linux")
Reported-by: Stephen Rothwell <[email-masked]>

> ---
>  include/linux/virtio_config.h | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
> index 4b517649cfe8..f9a33062c089 100644
> --- a/include/linux/virtio_config.h
> +++ b/include/linux/virtio_config.h
> @@ -16,8 +16,10 @@ struct virtio_shm_region {
>  	u64 len;
>  };
>  
> +typedef void vq_callback_t(struct virtqueue *);
> +
>  /**
> - * virtio_config_ops - operations for configuring a virtio device
> + * struct virtio_config_ops - operations for configuring a virtio device
>   * Note: Do not assume that a transport implements all of the operations
>   *       getting/setting a value as a simple read/write! Generally speaking,
>   *       any of @get/@set, @get_status/@set_status, or @get_features/
> @@ -68,8 +70,8 @@ struct virtio_shm_region {
>   * @finalize_features: confirm what device features we'll be using.
>   *	vdev: the virtio_device
>   *	This sends the driver feature bits to the device: it can change
> - *	the dev->feature bits if it wants.
> - * Note: despite the name this can be called any number of times.
> + *	the dev->feature bits if it wants. Note: despite the name this
> + *	can be called any number of times.
>   *	Returns 0 on success or error status
>   * @bus_name: return the bus name associated with the device (optional)
>   *	vdev: the virtio_device
> @@ -91,7 +93,6 @@ struct virtio_shm_region {
>   *	If disable_vq_and_reset is set, then enable_vq_after_reset must also be
>   *	set.
>   */
> -typedef void vq_callback_t(struct virtqueue *);
>  struct virtio_config_ops {
>  	void (*get)(struct virtio_device *vdev, unsigned offset,
>  		    void *buf, unsigned len);

Anyway, the warnings went away, thanks for the fixup!

Reviewed-by: Bagas Sanjaya <[email-masked]> 

-- 
An old man doll... just what I always wanted! - Clara