From: Kuniyuki Iwashima <kuniyu@google.com>
To: Andrew Lunn <andrew+netdev@lunn.ch>,
"David S . Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@kernel.org>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
David Ahern <dsahern@kernel.org>,
Ido Schimmel <idosch@nvidia.com>
Cc: Simon Horman <horms@kernel.org>,
Kuniyuki Iwashima <kuniyu@google.com>,
Kuniyuki Iwashima <kuni1840@gmail.com>,
netdev@vger.kernel.org, Elad Nachman <enachman@marvell.com>,
Saeed Mahameed <saeedm@nvidia.com>,
Leon Romanovsky <leon@kernel.org>,
Tariq Toukan <tariqt@nvidia.com>, Mark Bloch <mbloch@nvidia.com>,
Boris Pismenny <borisp@nvidia.com>,
Petr Machata <petrm@nvidia.com>, Jiri Pirko <jiri@resnulli.us>,
Edward Cree <ecree.xilinx@gmail.com>,
Nikolay Aleksandrov <razor@blackwall.org>
Subject: [PATCH v1 net-next 7/8] ipv4: Use ipv4_neigh_lookup() and friends.
Date: Wed, 30 Sep 2026 20:03:15 +0000 [thread overview]
Message-ID: <20260930200326.718459-8-kuniyu@google.com> (raw)
In-Reply-To: <20260930200326.718459-1-kuniyu@google.com>
It is error-prone to require callers to fetch netns and
neigh_table and pass it with dev to neigh_lookup(), etc.
Let's replace neigh_lookup() and friends with IPv4 helpers.
Note that __neigh_lookup(create=false) is replaced with
ipv4_neigh_lookup() and __neigh_lookup(create=true) and
__neigh_lookup_errno() are split into ipv4_neigh_lookup()
and ipv4_neigh_create().
Fixes: 2430df635a59 ("ipv4: Replace &arp_tbl with arp_table(net).")
Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
---
Cc: Elad Nachman <enachman@marvell.com>
Cc: Saeed Mahameed <saeedm@nvidia.com>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Tariq Toukan <tariqt@nvidia.com>
Cc: Mark Bloch <mbloch@nvidia.com>
Cc: Boris Pismenny <borisp@nvidia.com>
Cc: Petr Machata <petrm@nvidia.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: Edward Cree <ecree.xilinx@gmail.com>
Cc: Nikolay Aleksandrov <razor@blackwall.org>
---
.../marvell/prestera/prestera_router.c | 14 ++++------
.../mellanox/mlx5/core/en/tc_tun_encap.c | 3 +--
.../mellanox/mlx5/core/en_accel/ipsec.c | 6 ++---
.../ethernet/mellanox/mlxsw/spectrum_router.c | 13 +++-------
.../ethernet/mellanox/mlxsw/spectrum_span.c | 7 ++---
.../netronome/nfp/flower/tunnel_conf.c | 4 +--
drivers/net/ethernet/rocker/rocker_ofdpa.c | 2 +-
drivers/net/ethernet/sfc/tc_counters.c | 6 ++---
drivers/net/vxlan/vxlan_core.c | 8 ++----
net/bridge/br_arp_nd_proxy.c | 2 +-
net/ipv4/arp.c | 26 ++++++++++++-------
net/ipv4/fib_semantics.c | 3 +--
net/ipv4/route.c | 2 +-
13 files changed, 38 insertions(+), 58 deletions(-)
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_router.c b/drivers/net/ethernet/marvell/prestera/prestera_router.c
index ba45b61b09bb..44c9c1fa3189 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_router.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_router.c
@@ -683,8 +683,7 @@ __prestera_k_arb_n_offload_set(struct prestera_switch *sw,
{
struct neighbour *n;
- n = neigh_lookup(arp_table(&init_net), &nc->key.addr.u.ipv4,
- nc->key.dev);
+ n = ipv4_neigh_lookup(nc->key.dev, &nc->key.addr.u.ipv4);
if (!n)
return;
@@ -790,7 +789,7 @@ __prestera_k_arb_nc_kern_n_fetch(struct prestera_switch *sw,
int err;
memset(&nc->nh_neigh_info, 0, sizeof(nc->nh_neigh_info));
- n = neigh_lookup(arp_table(&init_net), &nc->key.addr.u.ipv4, nc->key.dev);
+ n = ipv4_neigh_lookup(nc->key.dev, &nc->key.addr.u.ipv4);
if (!n)
goto out;
@@ -1052,13 +1051,10 @@ static void __prestera_k_arb_hw_state_upd(struct prestera_switch *sw,
#endif /* PRESTERA_IMPLICITY_RESOLVE_DEAD_NEIGH */
if (nc->key.addr.v == PRESTERA_IPV4) {
- struct neigh_table *tbl = arp_table(&init_net);
-
- n = neigh_lookup(tbl, &nc->key.addr.u.ipv4,
- nc->key.dev);
+ n = ipv4_neigh_lookup(nc->key.dev, &nc->key.addr.u.ipv4);
if (!n)
- n = neigh_create(tbl, &nc->key.addr.u.ipv4,
- nc->key.dev);
+ n = ipv4_neigh_create(nc->key.dev,
+ &nc->key.addr.u.ipv4);
} else {
n = NULL;
}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c
index fe0258375ef6..5e40107efa26 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c
@@ -438,7 +438,6 @@ void mlx5e_tc_update_neigh_used_value(struct mlx5e_neigh_hash_entry *nhe)
if (neigh_used) {
struct net_device *dev = READ_ONCE(nhe->neigh_dev);
- struct net *net = dev_net(dev);
nhe->reported_lastuse = jiffies;
@@ -450,7 +449,7 @@ void mlx5e_tc_update_neigh_used_value(struct mlx5e_neigh_hash_entry *nhe)
n = ipv6_neigh_lookup(dev, &m_neigh->dst_ip);
else
#endif
- n = neigh_lookup(arp_table(net), &m_neigh->dst_ip, dev);
+ n = ipv4_neigh_lookup(dev, &m_neigh->dst_ip);
if (!n)
return;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
index 37a8ddee3ea1..16edd3263aed 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
@@ -262,7 +262,6 @@ static void mlx5e_ipsec_init_macs(struct mlx5e_ipsec_sa_entry *sa_entry,
struct net_device *netdev = sa_entry->dev;
struct xfrm_state *x = sa_entry->x;
struct dst_entry *rt_dst_entry;
- struct neigh_table *tbl;
struct flowi4 fl4 = {};
struct flowi6 fl6 = {};
struct neighbour *n;
@@ -365,10 +364,9 @@ static void mlx5e_ipsec_init_macs(struct mlx5e_ipsec_sa_entry *sa_entry,
return;
neigh:
- tbl = arp_table(dev_net(netdev));
- n = neigh_lookup(tbl, pkey, netdev);
+ n = ipv4_neigh_lookup(netdev, pkey);
if (!n) {
- n = neigh_create(tbl, pkey, netdev);
+ n = ipv4_neigh_create(netdev, pkey);
if (IS_ERR(n))
return;
neigh_event_send(n, NULL);
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index 1f4753213b9c..07d22257b703 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -2415,8 +2415,6 @@ static void mlxsw_sp_router_neigh_ent_ipv4_process(struct mlxsw_sp *mlxsw_sp,
int ent_index)
{
u64 max_rifs = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_RIFS);
- struct net *net = mlxsw_sp_net(mlxsw_sp);
- struct neigh_table *tbl;
struct net_device *dev;
struct neighbour *n;
__be32 dipn;
@@ -2432,10 +2430,9 @@ static void mlxsw_sp_router_neigh_ent_ipv4_process(struct mlxsw_sp *mlxsw_sp,
return;
}
- tbl = arp_table(net);
dipn = htonl(dip);
dev = mlxsw_sp_rif_dev(mlxsw_sp->router->rifs[rif]);
- n = neigh_lookup(tbl, &dipn, dev);
+ n = ipv4_neigh_lookup(dev, &dipn);
if (!n)
return;
@@ -4300,13 +4297,10 @@ static void __mlxsw_sp_nexthop_neigh_update(struct mlxsw_sp_nexthop *nh,
static struct neighbour *
mlxsw_sp_nexthop_neigh_lookup(struct mlxsw_sp_nexthop *nh)
{
- struct neigh_table *tbl;
struct net_device *dev;
struct neighbour *n;
- struct net *net;
dev = mlxsw_sp_nexthop_dev(nh);
- net = dev_net(dev);
#if IS_ENABLED(CONFIG_IPV6)
if (nh->family == AF_INET6) {
@@ -4319,10 +4313,9 @@ mlxsw_sp_nexthop_neigh_lookup(struct mlxsw_sp_nexthop *nh)
} else
#endif
{
- tbl = arp_table(net);
- n = neigh_lookup(tbl, &nh->gw_addr, dev);
+ n = ipv4_neigh_lookup(dev, &nh->gw_addr);
if (!n) {
- n = neigh_create(tbl, &nh->gw_addr, dev);
+ n = ipv4_neigh_create(dev, &nh->gw_addr);
if (!IS_ERR(n))
neigh_event_send(n, NULL);
}
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
index 79947f68b10d..0b84a25e2ea8 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
@@ -229,8 +229,6 @@ static int mlxsw_sp_span_dmac(int family,
struct net_device *dev,
unsigned char dmac[ETH_ALEN])
{
- struct net *net = dev_net(dev);
- struct neigh_table *tbl;
struct neighbour *neigh;
int err = 0;
@@ -245,10 +243,9 @@ static int mlxsw_sp_span_dmac(int family,
} else
#endif
{
- tbl = arp_table(net);
- neigh = neigh_lookup(tbl, pkey, dev);
+ neigh = ipv4_neigh_lookup(dev, pkey);
if (!neigh) {
- neigh = neigh_create(tbl, pkey, dev);
+ neigh = ipv4_neigh_create(dev, pkey);
if (IS_ERR(neigh))
return PTR_ERR(neigh);
}
diff --git a/drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c b/drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c
index 27d80ec8e895..3b47e9fe64e1 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c
@@ -209,7 +209,6 @@ void nfp_tunnel_keep_alive(struct nfp_app *app, struct sk_buff *skb)
{
struct nfp_tun_active_tuns *payload;
struct net_device *netdev;
- struct neigh_table *tbl;
int count, i, pay_len;
struct neighbour *n;
__be32 ipv4_addr;
@@ -236,8 +235,7 @@ void nfp_tunnel_keep_alive(struct nfp_app *app, struct sk_buff *skb)
if (!netdev)
continue;
- tbl = arp_table(dev_net(netdev));
- n = neigh_lookup(tbl, &ipv4_addr, netdev);
+ n = ipv4_neigh_lookup(netdev, &ipv4_addr);
if (!n)
continue;
diff --git a/drivers/net/ethernet/rocker/rocker_ofdpa.c b/drivers/net/ethernet/rocker/rocker_ofdpa.c
index ead8b447b89c..ace69a1d5275 100644
--- a/drivers/net/ethernet/rocker/rocker_ofdpa.c
+++ b/drivers/net/ethernet/rocker/rocker_ofdpa.c
@@ -1336,7 +1336,7 @@ static int ofdpa_port_ipv4_resolve(struct ofdpa_port *ofdpa_port,
int err = 0;
if (!n) {
- n = neigh_create(arp_table(&init_net), &ip_addr, dev);
+ n = ipv4_neigh_create(dev, &ip_addr);
if (IS_ERR(n))
return PTR_ERR(n);
}
diff --git a/drivers/net/ethernet/sfc/tc_counters.c b/drivers/net/ethernet/sfc/tc_counters.c
index ae6cc6b93864..fcb2be6abb20 100644
--- a/drivers/net/ethernet/sfc/tc_counters.c
+++ b/drivers/net/ethernet/sfc/tc_counters.c
@@ -91,7 +91,6 @@ static void efx_tc_counter_work(struct work_struct *work)
struct efx_tc_action_set *act;
unsigned long touched;
struct neighbour *n;
- struct net *net;
spin_lock_bh(&cnt->lock);
touched = READ_ONCE(cnt->touched);
@@ -106,14 +105,13 @@ static void efx_tc_counter_work(struct work_struct *work)
continue;
encap->neigh->used = touched;
- net = encap->neigh->net;
/* We have passed traffic using this ARP entry, so
* indicate to the ARP cache that it's still active
*/
if (encap->neigh->dst_ip)
- n = neigh_lookup(arp_table(net), &encap->neigh->dst_ip,
- encap->neigh->egdev);
+ n = ipv4_neigh_lookup(encap->neigh->egdev,
+ &encap->neigh->dst_ip);
else
#if IS_ENABLED(CONFIG_IPV6)
n = ipv6_neigh_lookup(encap->neigh->egdev,
diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index 513779c07621..35bd92f5e460 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -1877,7 +1877,6 @@ static int vxlan_err_lookup(struct sock *sk, struct sk_buff *skb)
static int arp_reduce(struct net_device *dev, struct sk_buff *skb,
const struct vxlan_config *cfg, __be32 vni)
{
- struct neigh_table *tbl = arp_table(dev_net(dev));
struct vxlan_dev *vxlan = netdev_priv(dev);
struct neighbour *n;
struct arphdr *parp;
@@ -1914,8 +1913,7 @@ static int arp_reduce(struct net_device *dev, struct sk_buff *skb,
ipv4_is_multicast(tip))
goto out;
- n = neigh_lookup(tbl, &tip, dev);
-
+ n = ipv4_neigh_lookup(dev, &tip);
if (n) {
struct vxlan_rdst *rdst = NULL;
u8 ha[ETH_ALEN] __aligned(2);
@@ -2145,7 +2143,6 @@ static int neigh_reduce(struct net_device *dev, struct sk_buff *skb,
static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb,
const struct vxlan_config *cfg)
{
- struct neigh_table *tbl;
struct neighbour *n;
if (is_multicast_ether_addr(eth_hdr(skb)->h_dest))
@@ -2160,9 +2157,8 @@ static bool route_shortcircuit(struct net_device *dev, struct sk_buff *skb,
if (!pskb_network_may_pull(skb, sizeof(struct iphdr)))
return false;
- tbl = arp_table(dev_net(dev));
pip = ip_hdr(skb);
- n = neigh_lookup(tbl, &pip->daddr, dev);
+ n = ipv4_neigh_lookup(dev, &pip->daddr);
if (!n && (cfg->flags & VXLAN_F_L3MISS)) {
union vxlan_addr ipa = {
.sin.sin_addr.s_addr = pip->daddr,
diff --git a/net/bridge/br_arp_nd_proxy.c b/net/bridge/br_arp_nd_proxy.c
index a303bf897f11..e3dbd71b30c5 100644
--- a/net/bridge/br_arp_nd_proxy.c
+++ b/net/bridge/br_arp_nd_proxy.c
@@ -210,7 +210,7 @@ void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
return;
}
- n = neigh_lookup(arp_table(dev_net(vlandev)), &tip, vlandev);
+ n = ipv4_neigh_lookup(vlandev, &tip);
if (n) {
struct net_bridge_fdb_entry *f;
u8 ha[ETH_ALEN] __aligned(2);
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 95f3359d0f92..1ca4ced280ae 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -892,7 +892,7 @@ static int arp_process(struct net *net, struct sock *sk, struct sk_buff *skb)
/* Update our ARP tables */
- n = __neigh_lookup(tbl, &sip, dev, 0);
+ n = ipv4_neigh_lookup(dev, &sip);
addr_type = -1;
if (n || arp_accept(in_dev, sip)) {
@@ -911,9 +911,14 @@ static int arp_process(struct net *net, struct sock *sk, struct sk_buff *skb)
(addr_type == RTN_UNICAST ||
(addr_type < 0 &&
/* postpone calculation to as late as possible */
- inet_addr_type_dev_table(net, dev, sip) ==
- RTN_UNICAST)))))
- n = __neigh_lookup(tbl, &sip, dev, 1);
+ inet_addr_type_dev_table(net, dev, sip) == RTN_UNICAST))))) {
+ n = ipv4_neigh_lookup(dev, &sip);
+ if (!n) {
+ n = ipv4_neigh_create(dev, &sip);
+ if (IS_ERR(n))
+ n = NULL;
+ }
+ }
}
if (n) {
@@ -1102,7 +1107,6 @@ static int arp_req_set_public(struct net *net, struct arpreq *r,
static int arp_req_set(struct net *net, struct arpreq *r)
{
- struct neigh_table *tbl = arp_table(net);
struct neighbour *neigh;
struct net_device *dev;
__be32 ip;
@@ -1138,7 +1142,9 @@ static int arp_req_set(struct net *net, struct arpreq *r)
ip = ((struct sockaddr_in *)&r->arp_pa)->sin_addr.s_addr;
- neigh = __neigh_lookup_errno(tbl, &ip, dev);
+ neigh = ipv4_neigh_lookup(dev, &ip);
+ if (!neigh)
+ neigh = ipv4_neigh_create(dev, &ip);
err = PTR_ERR(neigh);
if (!IS_ERR(neigh)) {
unsigned int state = NUD_STALE;
@@ -1174,7 +1180,6 @@ static unsigned int arp_state_to_flags(struct neighbour *neigh)
static int arp_req_get(struct net *net, struct arpreq *r)
{
__be32 ip = ((struct sockaddr_in *) &r->arp_pa)->sin_addr.s_addr;
- struct neigh_table *tbl = arp_table(net);
struct neighbour *neigh;
struct net_device *dev;
@@ -1185,7 +1190,7 @@ static int arp_req_get(struct net *net, struct arpreq *r)
if (IS_ERR(dev))
return PTR_ERR(dev);
- neigh = neigh_lookup(tbl, &ip, dev);
+ neigh = ipv4_neigh_lookup(dev, &ip);
if (!neigh)
return -ENXIO;
@@ -1210,12 +1215,13 @@ static int arp_req_get(struct net *net, struct arpreq *r)
int arp_invalidate(struct net_device *dev, __be32 ip, bool force)
{
- struct neigh_table *tbl = arp_table(dev_net(dev));
struct neighbour *neigh;
int err = -ENXIO;
- neigh = neigh_lookup(tbl, &ip, dev);
+ neigh = ipv4_neigh_lookup(dev, &ip);
if (neigh) {
+ struct neigh_table *tbl = neigh->tbl;
+
if ((READ_ONCE(neigh->nud_state) & NUD_VALID) && !force) {
neigh_release(neigh);
return 0;
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index a98c7670d2ce..235c51a6f8e5 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -610,12 +610,11 @@ static int fib_detect_death(struct fib_info *fi, int order,
int dflt)
{
const struct fib_nh_common *nhc = fib_info_nhc(fi, 0);
- struct net *net = fi->fib_net;
int state = NUD_NONE;
struct neighbour *n;
if (likely(nhc->nhc_gw_family == AF_INET))
- n = neigh_lookup(arp_table(net), &nhc->nhc_gw.ipv4, nhc->nhc_dev);
+ n = ipv4_neigh_lookup(nhc->nhc_dev, &nhc->nhc_gw.ipv4);
else if (IS_ENABLED(CONFIG_IPV6) && nhc->nhc_gw_family == AF_INET6)
n = ipv6_neigh_lookup(nhc->nhc_dev, &nhc->nhc_gw.ipv6);
else
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 50c842617e45..18b588dfbea7 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -817,7 +817,7 @@ static void __ip_do_redirect(struct rtable *rt, struct sk_buff *skb, struct flow
n = __ipv4_neigh_lookup(rt->dst.dev, (__force u32)new_gw);
if (!n)
- n = neigh_create(arp_table(net), &new_gw, rt->dst.dev);
+ n = ipv4_neigh_create(rt->dst.dev, &new_gw);
if (!IS_ERR(n)) {
if (!(READ_ONCE(n->nud_state) & NUD_VALID)) {
neigh_event_send(n, NULL);
--
2.56.0.rc1.315.gc6ed9934b7-goog
next prev parent reply other threads:[~2026-09-30 20:03 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-30 20:03 [PATCH v1 net-next 0/8] neighbour: Add IPv4/IPv6-specific wrappers for neigh_lookup() and friends Kuniyuki Iwashima
2026-09-30 20:03 ` [PATCH v1 net-next 1/8] ipv4: Rename ipv4_neigh_lookup() to ipv4_dst_neigh_lookup() Kuniyuki Iwashima
2026-09-30 20:03 ` [PATCH v1 net-next 2/8] ipv6: Rename ip6_neigh_lookup() to __ip6_dst_neigh_lookup() Kuniyuki Iwashima
2026-09-30 20:03 ` [PATCH v1 net-next 3/8] ipv4: Add wrappers for neigh_lookup() and neigh_create() Kuniyuki Iwashima
2026-09-30 20:03 ` [PATCH v1 net-next 4/8] ipv6: Add wrappers for neigh_lookup() and (__)?neigh_create() Kuniyuki Iwashima
2026-09-30 20:03 ` [PATCH v1 net-next 5/8] mlxsw: spectrum: Resolve neigh_table right before neigh_lookup() Kuniyuki Iwashima
2026-09-30 20:03 ` [PATCH v1 net-next 6/8] ipv6: Use ipv6_neigh_lookup() and friends Kuniyuki Iwashima
2026-10-02 2:03 ` netdev-bot+sashiko
2026-10-02 17:01 ` Kuniyuki Iwashima
2026-09-30 20:03 ` Kuniyuki Iwashima [this message]
2026-10-02 2:03 ` [PATCH v1 net-next 7/8] ipv4: Use ipv4_neigh_lookup() " netdev-bot+sashiko
2026-09-30 20:03 ` [PATCH v1 net-next 8/8] neighbour: Remove __neigh_lookup() and __neigh_lookup_errno() Kuniyuki Iwashima
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