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SubjectRE: [PATCH RFC 1/2] virtio: introduce packed ring defines
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From: Tiwei Bie
> Sent: 23 February 2018 11:18
...
> +struct vring_packed_desc_event {
> + /* Descriptor Event Offset */
> + __virtio16 desc_event_off : 15,
> + /* Descriptor Event Wrap Counter */
> + desc_event_wrap : 1;
> + /* Descriptor Event Flags */
> + __virtio16 desc_event_flags : 2;
> +};

This looks like you are assuming that a bit-field has a defined
layout and can be used to map a 'hardware' structure.
The don't, don't use them like that.

David

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