path: root/include/net/flow.h
diff options
authorEric Dumazet <eric.dumazet@gmail.com>2011-11-30 19:00:53 +0000
committerDavid S. Miller <davem@davemloft.net>2011-12-01 13:28:54 -0500
commit84f9307c5da84a7c8513e7607dc8427d2cbd63e3 (patch)
treef34fb0525284d97e2b10870afd8e021cc45ef44c /include/net/flow.h
parentdccp: Evaluate ip_hdr() only once in dccp_v4_route_skb(). (diff)
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/net/flow.h')
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