diff options
| author | Patrick McHardy <kaber@trash.net> | 2008-01-31 04:40:04 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-31 19:27:56 -0800 |
| commit | 380517dead6ab86d7249a1723f07f2f1b10af5f6 (patch) | |
| tree | 3b6cee7a9b246305c5a98d62aba00aebdde6d77b /include/net | |
| parent | ba419aff2cda91680e5d4d3eeff95df49bd2edec (diff) | |
| download | linux-380517dead6ab86d7249a1723f07f2f1b10af5f6.tar.bz2 | |
[NETFILTER]: nf_conntrack: avoid duplicate protocol comparison in nf_ct_tuple_equal()
nf_ct_tuple_src_equal() and nf_ct_tuple_dst_equal() both compare the protocol
numbers. Unfortunately gcc doesn't optimize out the second comparison, so
remove it and prefix both functions with __ to indicate that they should not
be used directly.
Saves another 16 byte of text in __nf_conntrack_find() on x86_64:
nf_conntrack_tuple_taken | -20 # 320 -> 300, size inlines: 181 -> 161
__nf_conntrack_find | -16 # 267 -> 251, size inlines: 127 -> 115
__nf_conntrack_confirm | -40 # 875 -> 835, size inlines: 570 -> 537
3 functions changed, 76 bytes removed
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/netfilter/nf_conntrack_tuple.h | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/include/net/netfilter/nf_conntrack_tuple.h b/include/net/netfilter/nf_conntrack_tuple.h index 45cb17cdcfd0..e69ab2e87597 100644 --- a/include/net/netfilter/nf_conntrack_tuple.h +++ b/include/net/netfilter/nf_conntrack_tuple.h @@ -132,34 +132,33 @@ struct nf_conntrack_tuple_hash #endif /* __KERNEL__ */ -static inline int nf_ct_tuple_src_equal(const struct nf_conntrack_tuple *t1, - const struct nf_conntrack_tuple *t2) +static inline int __nf_ct_tuple_src_equal(const struct nf_conntrack_tuple *t1, + const struct nf_conntrack_tuple *t2) { return (t1->src.u3.all[0] == t2->src.u3.all[0] && t1->src.u3.all[1] == t2->src.u3.all[1] && t1->src.u3.all[2] == t2->src.u3.all[2] && t1->src.u3.all[3] == t2->src.u3.all[3] && t1->src.u.all == t2->src.u.all && - t1->src.l3num == t2->src.l3num && - t1->dst.protonum == t2->dst.protonum); + t1->src.l3num == t2->src.l3num); } -static inline int nf_ct_tuple_dst_equal(const struct nf_conntrack_tuple *t1, - const struct nf_conntrack_tuple *t2) +static inline int __nf_ct_tuple_dst_equal(const struct nf_conntrack_tuple *t1, + const struct nf_conntrack_tuple *t2) { return (t1->dst.u3.all[0] == t2->dst.u3.all[0] && t1->dst.u3.all[1] == t2->dst.u3.all[1] && t1->dst.u3.all[2] == t2->dst.u3.all[2] && t1->dst.u3.all[3] == t2->dst.u3.all[3] && t1->dst.u.all == t2->dst.u.all && - t1->src.l3num == t2->src.l3num && t1->dst.protonum == t2->dst.protonum); } static inline int nf_ct_tuple_equal(const struct nf_conntrack_tuple *t1, const struct nf_conntrack_tuple *t2) { - return nf_ct_tuple_src_equal(t1, t2) && nf_ct_tuple_dst_equal(t1, t2); + return __nf_ct_tuple_src_equal(t1, t2) && + __nf_ct_tuple_dst_equal(t1, t2); } static inline int nf_ct_tuple_mask_equal(const struct nf_conntrack_tuple_mask *m1, @@ -199,7 +198,7 @@ static inline int nf_ct_tuple_mask_cmp(const struct nf_conntrack_tuple *t, const struct nf_conntrack_tuple_mask *mask) { return nf_ct_tuple_src_mask_cmp(t, tuple, mask) && - nf_ct_tuple_dst_equal(t, tuple); + __nf_ct_tuple_dst_equal(t, tuple); } #endif /* _NF_CONNTRACK_TUPLE_H */ |