diff options
| author | Alexander Duyck <alexander.h.duyck@intel.com> | 2012-05-04 14:26:56 +0000 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2014-06-09 13:29:00 +0100 |
| commit | 93a1554e0ca3cbabfb90d8d6edeb1680597283a3 (patch) | |
| tree | f995a71923888408e726ca24873cea51d1b3b98e /include | |
| parent | 7df12dedb762223a0594078b85849c4a35581e9a (diff) | |
skb: Add inline helper for getting the skb end offset from head
[ Upstream commit ec47ea82477404631d49b8e568c71826c9b663ac ]
With the recent changes for how we compute the skb truesize it occurs to me
we are probably going to have a lot of calls to skb_end_pointer -
skb->head. Instead of running all over the place doing that it would make
more sense to just make it a separate inline skb_end_offset(skb) that way
we can return the correct value without having gcc having to do all the
optimization to cancel out skb->head - skb->head.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/skbuff.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 13bd6d0e43c5..c445e5221d49 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -617,11 +617,21 @@ static inline unsigned char *skb_end_pointer(const struct sk_buff *skb) { return skb->head + skb->end; } + +static inline unsigned int skb_end_offset(const struct sk_buff *skb) +{ + return skb->end; +} #else static inline unsigned char *skb_end_pointer(const struct sk_buff *skb) { return skb->end; } + +static inline unsigned int skb_end_offset(const struct sk_buff *skb) +{ + return skb->end - skb->head; +} #endif /* Internal */ @@ -2549,7 +2559,7 @@ static inline bool skb_is_recycleable(const struct sk_buff *skb, int skb_size) return false; skb_size = SKB_DATA_ALIGN(skb_size + NET_SKB_PAD); - if (skb_end_pointer(skb) - skb->head < skb_size) + if (skb_end_offset(skb) < skb_size) return false; if (skb_shared(skb) || skb_cloned(skb)) |