[PATCH net-next 2/4] net: use indirect call helpers for dst_output

From: Brian Vazquez
Date: Thu Dec 10 2020 - 21:01:00 EST


From: brianvv <brianvv@xxxxxxxxxx>

This patch avoids the indirect call for the common case:
ip6_output and ip_output

Signed-off-by: brianvv <brianvv@xxxxxxxxxx>
---
include/net/dst.h | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/net/dst.h b/include/net/dst.h
index 98cf6e8c06c4..3932e9931f08 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -436,10 +436,16 @@ static inline void dst_set_expires(struct dst_entry *dst, int timeout)
dst->expires = expires;
}

+INDIRECT_CALLABLE_DECLARE(int ip6_output(struct net *, struct sock *,
+ struct sk_buff *));
+INDIRECT_CALLABLE_DECLARE(int ip_output(struct net *, struct sock *,
+ struct sk_buff *));
/* Output packet to network from transport. */
static inline int dst_output(struct net *net, struct sock *sk, struct sk_buff *skb)
{
- return skb_dst(skb)->output(net, sk, skb);
+ return INDIRECT_CALL_INET(skb_dst(skb)->output,
+ ip6_output, ip_output,
+ net, sk, skb);
}

INDIRECT_CALLABLE_DECLARE(int ip6_input(struct sk_buff *));
--
2.29.2.576.ga3fc446d84-goog