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

Link: https://lore.kernel.org/linux-next/20221220105956.4786852d@canb.auug.org.au/
Fixes: 333723e8bc393d ("docs: driver-api: virtio: virtio on Linux")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Ricardo Cañuelo <ricardo.canuelo@collabora.com>
Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com> 
---
Changes in v3:
  - Added a Fixes tag referencing the commit that revealed the warning
    messages (suggested by Bagas Sanjaya and Michael S. Tsirkin)

Changes in v2:
  - Reword the "Note" comment in the kerneldoc so that it doesn't look
    like a kerneldoc "Note" section (suggested by AngeloGioacchino Del
    Regno)
  - Link, Reported-by and Reviewed-by tags added (suggested by Bagas
    Sanjaya)

 include/linux/virtio_config.h | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index 4b517649cfe8..2b3438de2c4d 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/
@@ -69,7 +71,8 @@ struct virtio_shm_region {
  *	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.
+ *	Note that 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 +94,6 @@ 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);
-- 
2.25.1

On Tue, Dec 20, 2022 at 12:29:43PM +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
> 
> Link: https://lore.kernel.org/linux-next/20221220105956.4786852d@canb.auug.org.au/
> Fixes: 333723e8bc393d ("docs: driver-api: virtio: virtio on Linux")
> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
> Signed-off-by: Ricardo Cañuelo <ricardo.canuelo@collabora.com>
> Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com> 

I merged v2 already - squashed it in so Fixes isn't necessary.
I dropped Link: as well, probably going overboard for a fixup.

> ---
> Changes in v3:
>   - Added a Fixes tag referencing the commit that revealed the warning
>     messages (suggested by Bagas Sanjaya and Michael S. Tsirkin)
> 
> Changes in v2:
>   - Reword the "Note" comment in the kerneldoc so that it doesn't look
>     like a kerneldoc "Note" section (suggested by AngeloGioacchino Del
>     Regno)
>   - Link, Reported-by and Reviewed-by tags added (suggested by Bagas
>     Sanjaya)
> 
>  include/linux/virtio_config.h | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
> index 4b517649cfe8..2b3438de2c4d 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/
> @@ -69,7 +71,8 @@ struct virtio_shm_region {
>   *	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.
> + *	Note that 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 +94,6 @@ 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);
> -- 
> 2.25.1