From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joe Perches Subject: [PATCH] net: af_packet: Don't initialize vnet_hdr Date: Thu, 12 May 2011 13:36:10 -0700 Message-ID: <18a010357eb63dfd50751c5eb529f6261cf90ecd.1305232529.git.joe@perches.com> Cc: "David S. Miller" , netdev@vger.kernel.org To: linux-kernel@vger.kernel.org Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Save a memset, initialize only the portion necessary. packet_snd either gets this structure completely from memcpy_fromiovec or uses only the hdr_len set to 0, so don't always initialize the structure to 0. Signed-off-by: Joe Perches --- net/packet/af_packet.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index 549527b..ac88df9 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -1123,7 +1123,7 @@ static int packet_snd(struct socket *sock, __be16 proto; unsigned char *addr; int ifindex, err, reserve = 0; - struct virtio_net_hdr vnet_hdr = { 0 }; + struct virtio_net_hdr vnet_hdr; int offset = 0; int vnet_hdr_len; struct packet_sock *po = pkt_sk(sk); @@ -1206,7 +1206,9 @@ static int packet_snd(struct socket *sock, goto out_unlock; } - } + } else + vnet_hdr.hdr_len = 0; + err = -EMSGSIZE; if (!gso_type && (len > dev->mtu + reserve + VLAN_HLEN)) -- 1.7.5.rc3.dirty