linux-kernel - [PATCH v3] virtio: fix virtio_config

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Date:   Tue, 20 Dec 2022 12:29:43 +0100
From:   Ricardo Cañuelo <ricardo.canuelo@...labora.com>
To:     mst@...hat.com
Cc:     sfr@...b.auug.org.au, linux-kernel@...r.kernel.org,
        linux-next@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, kernel@...labora.com
Subject: [PATCH v3] virtio: fix virtio_config_ops kerneldocs

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@...b.auug.org.au>
Signed-off-by: Ricardo Cañuelo <ricardo.canuelo@...labora.com>
Reviewed-by: Bagas Sanjaya <bagasdotme@...il.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/@..._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