From: Nikolay Aleksandrov Date: Fri, 1 Nov 2019 12:46:39 +0000 (+0200) Subject: net: bridge: fdb: restore unlikely() when taking over externally added entries X-Git-Tag: for-linus-20191129~13^2~252^2 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=58ec1ea637ca2230c69d6972985ba619366c688b;p=linux-block.git net: bridge: fdb: restore unlikely() when taking over externally added entries Taking over hw-learned entries is not a likely scenario so restore the unlikely() use for the case of SW taking over externally learned entries. Signed-off-by: Nikolay Aleksandrov Signed-off-by: David S. Miller --- diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c index 7500c84fc675..284b3662d234 100644 --- a/net/bridge/br_fdb.c +++ b/net/bridge/br_fdb.c @@ -587,8 +587,10 @@ void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source, fdb->dst = source; fdb_modified = true; /* Take over HW learned entry */ - test_and_clear_bit(BR_FDB_ADDED_BY_EXT_LEARN, - &fdb->flags); + if (unlikely(test_bit(BR_FDB_ADDED_BY_EXT_LEARN, + &fdb->flags))) + clear_bit(BR_FDB_ADDED_BY_EXT_LEARN, + &fdb->flags); } if (now != fdb->updated) fdb->updated = now;