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virtio_ring: remove unnecessary to_vvq call in vring hot path

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It passes '_vq' to virtqueue_use_indirect(), which still calls
to_vvq to get 'vq', let's directly pass 'vq'. It can avoid
unnecessary call of to_vvq in hot path.

Signed-off-by: Xianting Tian <xianting.tian@linux.alibaba.com>
Message-Id: <20220328105817.1028065-1-xianting.tian@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
This commit is contained in:
Xianting Tian 2022-03-28 18:58:16 +08:00 committed by Michael S. Tsirkin
parent 0e9911fa76
commit 35c51e093d
1 changed files with 3 additions and 5 deletions
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8
drivers/virtio/virtio_ring.c
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@ -205,11 +205,9 @@ struct vring_virtqueue {
#define to_vvq(_vq) container_of(_vq, struct vring_virtqueue, vq)
static inline bool virtqueue_use_indirect(struct virtqueue *_vq,
static inline bool virtqueue_use_indirect(struct vring_virtqueue *vq,
unsigned int total_sg)
{
struct vring_virtqueue *vq = to_vvq(_vq);
/*
* If the host supports indirect descriptor tables, and we have multiple
* buffers, then go indirect. FIXME: tune this threshold
@ -499,7 +497,7 @@ static inline int virtqueue_add_split(struct virtqueue *_vq,
head = vq->free_head;
if (virtqueue_use_indirect(_vq, total_sg))
if (virtqueue_use_indirect(vq, total_sg))
desc = alloc_indirect_split(_vq, total_sg, gfp);
else {
desc = NULL;
@ -1178,7 +1176,7 @@ static inline int virtqueue_add_packed(struct virtqueue *_vq,
BUG_ON(total_sg == 0);
if (virtqueue_use_indirect(_vq, total_sg)) {
if (virtqueue_use_indirect(vq, total_sg)) {
err = virtqueue_add_indirect_packed(vq, sgs, total_sg, out_sgs,
in_sgs, data, gfp);
if (err != -ENOMEM) {