K. Y. Srinivasan <k...@microsoft.com> wrote:
> The rndis header is 116 bytes big and can be placed in the default
> head room that will be available in the skb. Since the netvsc packet
> is less than 48 bytes, we can use the skb control buffer
> for the netvsc packet. With these changes we don't need to
> ask for additional head room.

Minor nit: could you add a BUILD_BUG_ON test for this?  Something like

BUILD_BUG_ON(sizeof(struct hv_netvsc_packet) > FIELD_SIZEOF(struct sk_buff, 
cb));
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