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Subject[PATCH] virtio: add VIRTIO_RING_NO_LEGACY
Date
Add macro to disable legacy functions vring_init and vring_size.

Signed-off-by: Matej Genci <matej.genci@nutanix.com>
---
include/uapi/linux/virtio_ring.h | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/include/uapi/linux/virtio_ring.h b/include/uapi/linux/virtio_ring.h
index 4c4e24c291a5..496db2f33830 100644
--- a/include/uapi/linux/virtio_ring.h
+++ b/include/uapi/linux/virtio_ring.h
@@ -164,6 +164,8 @@ struct vring {
#define vring_used_event(vr) ((vr)->avail->ring[(vr)->num])
#define vring_avail_event(vr) (*(__virtio16 *)&(vr)->used->ring[(vr)->num])

+#ifndef VIRTIO_RING_NO_LEGACY
+
static inline void vring_init(struct vring *vr, unsigned int num, void *p,
unsigned long align)
{
@@ -181,6 +183,8 @@ static inline unsigned vring_size(unsigned int num, unsigned long align)
+ sizeof(__virtio16) * 3 + sizeof(struct vring_used_elem) * num;
}

+#endif
+
/* The following is used with USED_EVENT_IDX and AVAIL_EVENT_IDX */
/* Assuming a given event_idx value from the other side, if
* we have just incremented index from old to new_idx,
--
2.22.0
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