net: bridge: Add support for calling FDB external learning under rcu
This is done as a preparation to moving the switchdev notifier chain
to be atomic. The FDB external learning should be called under rtnl
or rcu.
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/bridge/br.c b/net/bridge/br.c
index 889e564..e962fff 100644
--- a/net/bridge/br.c
+++ b/net/bridge/br.c
@@ -121,7 +121,7 @@ static struct notifier_block br_device_notifier = {
.notifier_call = br_device_event
};
-/* called with RTNL */
+/* called with RTNL or RCU */
static int br_switchdev_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
@@ -131,7 +131,7 @@ static int br_switchdev_event(struct notifier_block *unused,
struct switchdev_notifier_fdb_info *fdb_info;
int err = NOTIFY_DONE;
- p = br_port_get_rtnl(dev);
+ p = br_port_get_rtnl_rcu(dev);
if (!p)
goto out;
