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virtio: mark vring_dma_dev() static

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We get 1 warning when building kernel with W=1:
drivers/virtio/virtio_ring.c:170:16: warning: no previous prototype for 'vring_dma_dev' [-Wmissing-prototypes]

In fact, this function is only used in the file in which it is
declared and don't need a declaration, but can be made static.
so this patch marks this function with 'static'.

Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Baoyou Xie 2016-09-01 19:02:57 +08:00 committed by Michael S. Tsirkin
parent 3eab887a55
commit af7c1beccf
1 changed files with 1 additions and 1 deletions
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2
drivers/virtio/virtio_ring.c
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@ -167,7 +167,7 @@ static bool vring_use_dma_api(struct virtio_device *vdev)
* making all of the arch DMA ops work on the vring device itself
* is a mess. For now, we use the parent device for DMA ops.
*/
struct device *vring_dma_dev(const struct vring_virtqueue *vq)
static struct device *vring_dma_dev(const struct vring_virtqueue *vq)
{
return vq->vq.vdev->dev.parent;
}