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net-tc: convert tc_verd to integer bitfields

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Extract the remaining two fields from tc_verd and remove the __u16
completely. TC_AT and TC_FROM are converted to equivalent two-bit
integer fields tc_at and tc_from. Where possible, use existing
helper skb_at_tc_ingress when reading tc_at. Introduce helper
skb_reset_tc to clear fields.

Not documenting tc_from and tc_at, because they will be replaced
with single bit fields in follow-on patches.

Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Willem de Bruijn
2017-01-07 17:06:36 -05:00
committed by David S. Miller
parent e7246e122a
commit a5135bcfba
11 changed files with 29 additions and 65 deletions
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3
net/core/skbuff.c
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@@ -878,9 +878,6 @@ static void __copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
#endif
#ifdef CONFIG_NET_SCHED
CHECK_SKB_FIELD(tc_index);
#ifdef CONFIG_NET_CLS_ACT
CHECK_SKB_FIELD(tc_verd);
#endif
#endif
}