From f7fce74e387e0563e5a165704664aa5ee8b2f48b Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 1 Dec 2010 06:03:06 +0000 Subject: [PATCH] net: kill an RCU warning in inet_fill_link_af() commits 9f0f7272 (ipv4: AF_INET link address family) and cf7afbfeb8c (rtnl: make link af-specific updates atomic) used incorrect __in_dev_get_rcu() in RTNL protected contexts, triggering PROVE_RCU warnings. Switch to __in_dev_get_rtnl(), wich is more appropriate, since we hold RTNL. Based on a report and initial patch from Amerigo Wang. Reported-by: Amerigo Wang Signed-off-by: Eric Dumazet Cc: Thomas Graf Reviewed-by: WANG Cong Signed-off-by: David S. Miller --- net/ipv4/devinet.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index d9f71bae45c4..3b067704ab38 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -1258,7 +1258,7 @@ errout: static size_t inet_get_link_af_size(const struct net_device *dev) { - struct in_device *in_dev = __in_dev_get_rcu(dev); + struct in_device *in_dev = __in_dev_get_rtnl(dev); if (!in_dev) return 0; @@ -1268,7 +1268,7 @@ static size_t inet_get_link_af_size(const struct net_device *dev) static int inet_fill_link_af(struct sk_buff *skb, const struct net_device *dev) { - struct in_device *in_dev = __in_dev_get_rcu(dev); + struct in_device *in_dev = __in_dev_get_rtnl(dev); struct nlattr *nla; int i; @@ -1295,7 +1295,7 @@ static int inet_validate_link_af(const struct net_device *dev, struct nlattr *a, *tb[IFLA_INET_MAX+1]; int err, rem; - if (dev && !__in_dev_get_rcu(dev)) + if (dev && !__in_dev_get_rtnl(dev)) return -EAFNOSUPPORT; err = nla_parse_nested(tb, IFLA_INET_MAX, nla, inet_af_policy); @@ -1319,7 +1319,7 @@ static int inet_validate_link_af(const struct net_device *dev, static int inet_set_link_af(struct net_device *dev, const struct nlattr *nla) { - struct in_device *in_dev = __in_dev_get_rcu(dev); + struct in_device *in_dev = __in_dev_get_rtnl(dev); struct nlattr *a, *tb[IFLA_INET_MAX+1]; int rem; -- 2.39.5