From: Johannes Berg <johannes@sipsolutions.net>
To: Florian Westphal <fw@strlen.de>
Cc: netdev@vger.kernel.org, linux-wireless@vger.kernel.org
Subject: Re: [PATCH RFC 08/14] net: wireless: mac80211: shrink ieee80211_tx_info
Date: Mon, 02 Mar 2015 19:53:45 +0100 [thread overview]
Message-ID: <1425322425.1906.4.camel@sipsolutions.net> (raw)
In-Reply-To: <1425318028-26531-9-git-send-email-fw@strlen.de> (sfid-20150302_184059_463522_70F2B3E8)
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
next prev parent reply other threads:[~2015-03-02 18:53 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1425318028-26531-1-git-send-email-fw@strlen.de>
2015-03-02 17:40 ` [PATCH RFC 04/14] drivers: wireless: rt2x00: move skb_dma to queue entry Florian Westphal
2015-03-02 17:40 ` [PATCH RFC 05/14] drivers: wireless: ar5523: use container_of Florian Westphal
2015-03-03 9:16 ` Pontus Fuchs
2015-03-02 17:40 ` [PATCH RFC 06/14] drivers: wireless: carl9170: shrink carl9170_tx_info Florian Westphal
2015-03-02 17:40 ` [PATCH RFC 07/14] net: wireless: iwlwifi: shrink status private area Florian Westphal
2015-03-02 17:40 ` [PATCH RFC 08/14] net: wireless: mac80211: shrink ieee80211_tx_info Florian Westphal
2015-03-02 18:53 ` Johannes Berg [this message]
2015-03-02 19:03 ` Florian Westphal
2015-03-02 19:18 ` Johannes Berg
2015-03-02 19:30 ` Florian Westphal
2015-03-02 17:40 ` [PATCH RFC 09/14] net: wireless: mac80211: shrink private driver area Florian Westphal
2015-03-02 18:52 ` Johannes Berg
2015-03-02 19:49 ` [PATCH RFC 00/14] shrink skb cb to 44 bytes Eric Dumazet
2015-03-02 20:42 ` Florian Westphal
2015-03-02 21:56 ` Eric Dumazet
2015-03-02 22:17 ` David Miller
2015-03-03 4:02 ` Eric Dumazet
2015-03-03 4:05 ` David Miller
2015-03-03 11:43 ` Florian Westphal
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