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Re: [PATCH RFC 08/14] net: wireless: mac80211: shrink ieee80211_tx_info

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On Mon, 2015-03-02 at 18:40 +0100, Florian Westphal wrote:
> to make it fit into (future) 44-byte sized skb->cb[].
> 
> This works, since flags is only used to store values
> from mac80211_tx_control_flags enum, and these are just 2 bits.
> We can thus move this to the padding hole inside the union.
> 
> Also add BUILD_BUG_ON magic to make sure that the new flags
> field doesn't share storage w. other members of the union.

This is really ugly - what's the point of this?

Mind you - we are actually acutely out of space and would rather have
*more*, not less.

johannes

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