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virtio: move dev_to_virtio() to use container_of_const()

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The driver core is changing to pass some pointers as const, so move
dev_to_virtio() to use container_of_const() to handle this change.

dev_to_virtio() now properly keeps the const-ness of the pointer passed
into it, while as before it could be lost.

Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20230111113018.459199-12-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2023-01-11 12:30:13 +01:00
parent 8afdae83e3
commit af3011b663
1 changed files with 1 additions and 4 deletions
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5
include/linux/virtio.h
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@ -127,10 +127,7 @@ struct virtio_device {
void *priv;
};
static inline struct virtio_device *dev_to_virtio(struct device *_dev)
{
return container_of(_dev, struct virtio_device, dev);
}
#define dev_to_virtio(_dev) container_of_const(_dev, struct virtio_device, dev)
void virtio_add_status(struct virtio_device *dev, unsigned int status);
int register_virtio_device(struct virtio_device *dev);