[IPV4]: Prepare FIB core for RCU.

* RCU versions of hlist_***_rcu
* fib_alias partial rcu port just whats needed now.

Signed-off-by: Robert Olsson <Robert.Olsson@data.slu.se>
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
index 7e4651b3caa..d41219e8037 100644
--- a/net/ipv4/fib_semantics.c
+++ b/net/ipv4/fib_semantics.c
@@ -854,6 +854,7 @@ failure:
         return NULL;
 }
 
+/* Note! fib_semantic_match intentionally uses  RCU list functions. */
 int fib_semantic_match(struct list_head *head, const struct flowi *flp,
                        struct fib_result *res, __u32 zone, __u32 mask, 
                         int prefixlen)
@@ -861,7 +862,7 @@ int fib_semantic_match(struct list_head *head, const struct flowi *flp,
         struct fib_alias *fa;
         int nh_sel = 0;
 
-        list_for_each_entry(fa, head, fa_list) {
+        list_for_each_entry_rcu(fa, head, fa_list) {
                 int err;
 
                 if (fa->fa_tos &&