From 31f1155bdc26aabd8de4bdf25e1c9ce9dbb21ff5 Mon Sep 17 00:00:00 2001 From: Nikolay Aleksandrov Date: Fri, 1 Nov 2019 14:46:38 +0200 Subject: [PATCH] net: bridge: fdb: avoid two atomic bitops in br_fdb_external_learn_add() If we setup the fdb flags prior to calling fdb_create() we can avoid two atomic bitops when learning a new entry. Signed-off-by: Nikolay Aleksandrov Signed-off-by: David S. Miller --- net/bridge/br_fdb.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c index b37e0f4c1b2b..7500c84fc675 100644 --- a/net/bridge/br_fdb.c +++ b/net/bridge/br_fdb.c @@ -1113,14 +1113,15 @@ int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p, fdb = br_fdb_find(br, addr, vid); if (!fdb) { - fdb = fdb_create(br, p, addr, vid, 0); + unsigned long flags = BIT(BR_FDB_ADDED_BY_EXT_LEARN); + + if (swdev_notify) + flags |= BIT(BR_FDB_ADDED_BY_USER); + fdb = fdb_create(br, p, addr, vid, flags); if (!fdb) { err = -ENOMEM; goto err_unlock; } - if (swdev_notify) - set_bit(BR_FDB_ADDED_BY_USER, &fdb->flags); - set_bit(BR_FDB_ADDED_BY_EXT_LEARN, &fdb->flags); fdb_notify(br, fdb, RTM_NEWNEIGH, swdev_notify); } else { fdb->updated = jiffies;