ipv6: ipv6_chk_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 33ee84c..ea63442 100644 (file)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1880,22 +1880,20 @@ EXPORT_SYMBOL(ipv6_chk_custom_prefix);
 
 int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev)
 {
-       struct inet6_dev *idev;
-       struct inet6_ifaddr *ifa;
+       const struct inet6_ifaddr *ifa;
+       const struct inet6_dev *idev;
        int     onlink;
 
        onlink = 0;
        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) {
                        onlink = ipv6_prefix_equal(addr, &ifa->addr,
                                                   ifa->prefix_len);
                        if (onlink)
                                break;
                }
-               read_unlock_bh(&idev->lock);
        }
        rcu_read_unlock();
        return onlink;