[RFC v5 4/5] virtio_ring: add event idx support in packed ring

This commit introduces the EVENT_IDX support in packed ring. Signed-off-by: Tiwei Bie --- drivers/virtio/virtio_ring.c | 67 ++-- 1 file changed, 64 insertions(+), 3 deletions(-) diff --git a/drivers/virtio/virtio_ring.c

[RFC v5 4/5] virtio_ring: add event idx support in packed ring

This commit introduces the EVENT_IDX support in packed ring. Signed-off-by: Tiwei Bie --- drivers/virtio/virtio_ring.c | 67 ++-- 1 file changed, 64 insertions(+), 3 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index