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Date: Thu, 31 Mar 2011 17:12:11 -0700 (PDT)
From: David Miller <davem@...emloft.net>
To: netdev@...r.kernel.org
Subject: [PATCH 1/7] net: Add helper flowi4_init_output().
On-stack initialization via assignment of flow structures are
expensive because GCC emits a memset() to clear the entire
structure out no matter what.
Add a helper for ipv4 output flow key setup which we can use to avoid
the memset.
Signed-off-by: David S. Miller <davem@...emloft.net>
---
include/net/flow.h | 21 +++++++++++++++++++++
1 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/include/net/flow.h b/include/net/flow.h
index 7fe5a0f..37e77d6 100644
--- a/include/net/flow.h
+++ b/include/net/flow.h
@@ -70,6 +70,27 @@ struct flowi4 {
#define fl4_gre_key uli.gre_key
};
+static inline void flowi4_init_output(struct flowi4 *fl4, int oif,
+ __u32 mark, __u8 tos, __u8 scope,
+ __u8 proto, __u8 flags,
+ __be32 daddr, __be32 saddr,
+ __be16 dport, __be32 sport)
+{
+ fl4->flowi4_oif = oif;
+ fl4->flowi4_iif = 0;
+ fl4->flowi4_mark = mark;
+ fl4->flowi4_tos = tos;
+ fl4->flowi4_scope = scope;
+ fl4->flowi4_proto = proto;
+ fl4->flowi4_flags = flags;
+ fl4->flowi4_secid = 0;
+ fl4->daddr = daddr;
+ fl4->saddr = saddr;
+ fl4->fl4_sport = sport;
+ fl4->fl4_dport = dport;
+}
+
+
struct flowi6 {
struct flowi_common __fl_common;
#define flowi6_oif __fl_common.flowic_oif
--
1.7.4.2
--
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