[RFC virtio-next 2/4] include/vring.h: Add support for reversed vritio rings.

[Sjur BrÃndeland]

From: Sjur BrÃndeland <sjur.brandeland@xxxxxxxxxxxxxx>

Add last avilable index to the vring_virtqueue structure,
this is done to prepare for implementation of the reversed vring.

Signed-off-by: Sjur BrÃndeland <sjur.brandeland@xxxxxxxxxxxxxx>
---
 drivers/virtio/vring.h |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/virtio/vring.h b/drivers/virtio/vring.h
index b997fc3..3b53961 100644
--- a/drivers/virtio/vring.h
+++ b/drivers/virtio/vring.h
@@ -51,6 +51,9 @@ struct vring_virtqueue
 	/* Last used index we've seen. */
 	u16 last_used_idx;
 
+	/* Last avail index seen. NOTE: Only used for reversed rings.*/
+	u16 last_avail_idx;
+
 	/* How to notify other side. FIXME: commonalize hcalls! */
 	void (*notify)(struct virtqueue *vq);
 
-- 
1.7.9.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/