On Tue, Dec 08, 2020 at 07:57:51PM +0800, liush wrote:
> 'num' can represent the value of out_sgs(in_sags), no need to pass
> in constant parameters in 'virtqueue_add'.
>
> Signed-off-by: liush <liush@xxxxxxxxxxxxxxxxx>
Point being?
A constant is likely easier for the compiler to optimize ...
> ---
> drivers/virtio/virtio_ring.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> index becc776..7583f8b 100644
> --- a/drivers/virtio/virtio_ring.c
> +++ b/drivers/virtio/virtio_ring.c
> @@ -1760,7 +1760,7 @@ int virtqueue_add_outbuf(struct virtqueue *vq,
> void *data,
> gfp_t gfp)
> {
> - return virtqueue_add(vq, &sg, num, 1, 0, data, NULL, gfp);
> + return virtqueue_add(vq, &sg, num, num, 0, data, NULL, gfp);
> }
> EXPORT_SYMBOL_GPL(virtqueue_add_outbuf);
>
> @@ -1782,7 +1782,7 @@ int virtqueue_add_inbuf(struct virtqueue *vq,
> void *data,
> gfp_t gfp)
> {
> - return virtqueue_add(vq, &sg, num, 0, 1, data, NULL, gfp);
> + return virtqueue_add(vq, &sg, num, 0, num, data, NULL, gfp);
> }
> EXPORT_SYMBOL_GPL(virtqueue_add_inbuf);
>
> --
> 2.7.4
_______________________________________________
Virtualization mailing list
Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
https://lists.linuxfoundation.org/mailman/listinfo/virtualization
