On Sat, 2011-08-27 at 09:07 +0800, Wang Sheng-Hui wrote:
> The patch is against 3.1-rc3.
>
> struct vring_used has two __u16 fields plus array of struct vring_used_elem.
> Current vring_size counts the __u16 fields to 3. Fix it to 2 in the patch.
>
> Signed-off-by: Wang Sheng-Hui <shhuiw@xxxxxxxxx>
> ---
> include/linux/virtio_ring.h | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h
> index 4a32cb6..fcda152 100644
> --- a/include/linux/virtio_ring.h
> +++ b/include/linux/virtio_ring.h
> @@ -143,7 +143,7 @@ static inline unsigned vring_size(unsigned int num, unsigned long align)
> {
> return ((sizeof(struct vring_desc) * num + sizeof(__u16) * (2 + num)
> + align - 1) & ~(align - 1))
> - + sizeof(__u16) * 3 + sizeof(struct vring_used_elem) * num;
> + + sizeof(__u16) * 2 + sizeof(struct vring_used_elem) * num;
> }
>
> /* The following is used with USED_EVENT_IDX and AVAIL_EVENT_IDX */
Hi:
I'm not deep into it, but I think you can see this:
http://marc.info/?l=git-commits-head&m=130687915816130&w=2
Thanks
-Wanlong Gao
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