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| author |   Eric Dumazet <eric.dumazet@gmail.com> | 2011-11-30 19:00:53 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2011-12-01 13:28:54 -0500 |
| commit | 84f9307c5da84a7c8513e7607dc8427d2cbd63e3 (patch) | |
| tree | f34fb0525284d97e2b10870afd8e021cc45ef44c /include | |
| parent | dccp: Evaluate ip_hdr() only once in dccp_v4_route_skb(). (diff) | |
| download | linux-dev-84f9307c5da84a7c8513e7607dc8427d2cbd63e3.tar.xz linux-dev-84f9307c5da84a7c8513e7607dc8427d2cbd63e3.zip | |
ipv4: use a 64bit load/store in output path
gcc compiler is smart enough to use a single load/store if we
memcpy(dptr, sptr, 8) on x86_64, regardless of
CONFIG_CC_OPTIMIZE_FOR_SIZE
In IP header, daddr immediately follows saddr, this wont change in the
future. We only need to make sure our flowi4 (saddr,daddr) fields wont
break the rule.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/flow.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/net/flow.h b/include/net/flow.h index a09447749e2d..9192d690b562 100644 --- a/include/net/flow.h +++ b/include/net/flow.h @@ -59,8 +59,11 @@ struct flowi4 { #define flowi4_proto __fl_common.flowic_proto #define flowi4_flags __fl_common.flowic_flags #define flowi4_secid __fl_common.flowic_secid - __be32 daddr; + + /* (saddr,daddr) must be grouped, same order as in IP header */ __be32 saddr; + __be32 daddr; + union flowi_uli uli; #define fl4_sport uli.ports.sport #define fl4_dport uli.ports.dport |