ipv6: ipv6_chk_custom_prefix() rcu conversion

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 2e029c8be1f2e2746e804a47bb5a3eb632adaa5d..33ee84c2512b50e316a0a6ed38a604a382ce5319 100644 (file)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1859,20 +1859,18 @@ static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
 bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
        const unsigned int prefix_len, struct net_device *dev)
 {
-       struct inet6_dev *idev;
-       struct inet6_ifaddr *ifa;
+       const struct inet6_ifaddr *ifa;
+       const struct inet6_dev *idev;
        bool ret = false;
 
        rcu_read_lock();
        idev = __in6_dev_get(dev);
        if (idev) {
-               read_lock_bh(&idev->lock);
-               list_for_each_entry(ifa, &idev->addr_list, if_list) {
+               list_for_each_entry_rcu(ifa, &idev->addr_list, if_list) {
                        ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len);
                        if (ret)
                                break;
                }
-               read_unlock_bh(&idev->lock);
        }
        rcu_read_unlock();