net: neighbour: Remove CONFIG_ARPD

This config option is superfluous in that it only guards a call
to neigh_app_ns(). Enabling CONFIG_ARPD by default has no
change in behavior. There will now be call to __neigh_notify()
for each ARP resolution, which has no impact unless there is a
user space daemon waiting to receive the notification, i.e.,
the case for which CONFIG_ARPD was designed anyways.

Suggested-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Gao feng <gaofeng@cn.fujitsu.com>
Cc: Joe Perches <joe@perches.com>
Cc: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 16 deletions

diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
index 37cf1a6ea3ad..05c57f0fcabe 100644
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -259,22 +259,6 @@ config IP_PIMSM_V2
           gated-5). This routing protocol is not used widely, so say N unless
           you want to play with it.
 
-config ARPD
-        bool "IP: ARP daemon support"
-        ---help---
-          The kernel maintains an internal cache which maps IP addresses to
-          hardware addresses on the local network, so that Ethernet
-          frames are sent to the proper address on the physical networking
-          layer. Normally, kernel uses the ARP protocol to resolve these
-          mappings.
-
-          Saying Y here adds support to have an user space daemon to do this
-          resolution instead. This is useful for implementing an alternate
-          address resolution protocol (e.g. NHRP on mGRE tunnels) and also for
-          testing purposes.
-
-          If unsure, say N.
-
 config SYN_COOKIES
         bool "IP: TCP syncookie support"
         ---help---