From: Eric Dumazet <edumazet@google.com>
Date: Thu, 18 Sep 2014 15:02:05 +0000 (-0700)
Subject: net: sched: shrink struct qdisc_skb_cb to 28 bytes
X-Git-Tag: fixes-for-v3.18-merge-window~87^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=257117862634d89de33fec74858b1a0ba5ab444b;p=pandora-kernel.git

net: sched: shrink struct qdisc_skb_cb to 28 bytes

We cannot make struct qdisc_skb_cb bigger without impacting IPoIB,
or increasing skb->cb[] size.

Commit e0f31d849867 ("flow_keys: Record IP layer protocol in
skb_flow_dissect()") broke IPoIB.

Only current offender is sch_choke, and this one do not need an
absolutely precise flow key.

If we store 17 bytes of flow key, its more than enough. (Its the actual
size of flow_keys if it was a packed structure, but we might add new
fields at the end of it later)

Signed-off-by: Eric Dumazet <edumazet@google.com>
Fixes: e0f31d849867 ("flow_keys: Record IP layer protocol in skb_flow_dissect()")
Signed-off-by: David S. Miller <davem@davemloft.net>
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