From a154d5d83d21af6b9ee32adc5dbcea5ac1fb534c Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Mon, 4 Mar 2019 21:38:03 +0100
Subject: [PATCH] net: ignore sysctl_devconf_inherit_init_net without SYSCTL
When CONFIG_SYSCTL is turned off, we get a link failure for
the newly introduced tuning knob.
net/ipv6/addrconf.o: In function `addrconf_init_net':
addrconf.c:(.text+0x31dc): undefined reference to `sysctl_devconf_inherit_init_net'
Add an IS_ENABLED() check to fall back to the default behavior
(sysctl_devconf_inherit_init_net=0) here.
Fixes: 856c395cfa63 ("net: introduce a knob to control whether to inherit devconf config")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Christian Brauner <christian@brauner.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/ipv4/devinet.c | 4 +++-
net/ipv6/addrconf.c | 3 ++-
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index cd9033245b985..eb514f312e6fa 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -2614,7 +2614,9 @@ static __net_init int devinet_init_net(struct net *net)
tbl[0].extra2 = net;
#endif
- if (sysctl_devconf_inherit_init_net != 2 && !net_eq(net, &init_net)) {
+ if ((!IS_ENABLED(CONFIG_SYSCTL) ||
+ sysctl_devconf_inherit_init_net != 2) &&
+ !net_eq(net, &init_net)) {
memcpy(all, init_net.ipv4.devconf_all, sizeof(ipv4_devconf));
memcpy(dflt, init_net.ipv4.devconf_dflt, sizeof(ipv4_devconf_dflt));
}
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index da5a21050ba92..4ae17a966ae3d 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -6905,7 +6905,8 @@ static int __net_init addrconf_init_net(struct net *net)
if (!dflt)
goto err_alloc_dflt;
- if (sysctl_devconf_inherit_init_net == 1 && !net_eq(net, &init_net)) {
+ if (IS_ENABLED(CONFIG_SYSCTL) &&
+ sysctl_devconf_inherit_init_net == 1 && !net_eq(net, &init_net)) {
memcpy(all, init_net.ipv6.devconf_all, sizeof(ipv6_devconf));
memcpy(dflt, init_net.ipv6.devconf_dflt, sizeof(ipv6_devconf_dflt));
}
--
2.30.2