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| author |   Willem de Bruijn <willemb@google.com> | 2018-10-05 11:31:40 -0400 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-10-05 11:52:38 -0700 |
| commit | f2e9de210d50187d206989e60bc5a99c2b692209 (patch) | |
| tree | 89597b81b0eb9e6ce7318ace7a17ff8ec507c325 /net/ipv4/udp_offload.c | |
| parent | gigaset: asyncdata: mark expected switch fall-throughs (diff) | |
| download | linux-dev-f2e9de210d50187d206989e60bc5a99c2b692209.tar.xz linux-dev-f2e9de210d50187d206989e60bc5a99c2b692209.zip | |
udp: gro behind static key
Avoid the socket lookup cost in udp_gro_receive if no socket has a
udp tunnel callback configured.
udp_sk(sk)->gro_receive requires a registration with
setup_udp_tunnel_sock, which enables the static key.
Signed-off-by: Willem de Bruijn <willemb@google.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/udp_offload.c')
| -rw-r--r-- | net/ipv4/udp_offload.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/udp_offload.c b/net/ipv4/udp_offload.c index 0c0522b79b43..802f2bc00d69 100644 --- a/net/ipv4/udp_offload.c +++ b/net/ipv4/udp_offload.c @@ -405,7 +405,7 @@ static struct sk_buff *udp4_gro_receive(struct list_head *head, { struct udphdr *uh = udp_gro_udphdr(skb); - if (unlikely(!uh)) + if (unlikely(!uh) || !static_branch_unlikely(&udp_encap_needed_key)) goto flush; /* Don't bother verifying checksum if we're going to flush anyway. */ |