From 45b90ec9a214ff7fbde8190126301a07387c46e5 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 28 Feb 2024 13:54:36 +0000 Subject: ipv6: addrconf_disable_policy() optimization Writing over /proc/sys/net/ipv6/conf/default/disable_policy does not need to hold RTNL. Signed-off-by: Eric Dumazet Reviewed-by: Jiri Pirko Signed-off-by: David S. Miller --- net/ipv6/addrconf.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) (limited to 'net/ipv6') diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 44340ff82da5..0e7135a206b0 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -6693,20 +6693,19 @@ void addrconf_disable_policy_idev(struct inet6_dev *idev, int val) static int addrconf_disable_policy(struct ctl_table *ctl, int *valp, int val) { + struct net *net = (struct net *)ctl->extra2; struct inet6_dev *idev; - struct net *net; + + if (valp == &net->ipv6.devconf_dflt->disable_policy) { + WRITE_ONCE(*valp, val); + return 0; + } if (!rtnl_trylock()) return restart_syscall(); WRITE_ONCE(*valp, val); - net = (struct net *)ctl->extra2; - if (valp == &net->ipv6.devconf_dflt->disable_policy) { - rtnl_unlock(); - return 0; - } - if (valp == &net->ipv6.devconf_all->disable_policy) { struct net_device *dev; -- cgit v1.2.3