net: hsr: remove synchronize_rcu() from hsr_add_port()

A synchronize_rcu() was added by mistake in commit
c5a759117210 ("net/hsr: Use list_head (and rcu) instead
of array for slave devices.")

RCU does not mandate to observe a grace period after
list_add_tail_rcu().

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250107144701.503884-1-edumazet@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

diff --git a/net/hsr/hsr_slave.c b/net/hsr/hsr_slave.c
index 006d6ef97e53f4077eb16f08077ee366d8cb4bbd..2a802a5de2acca1d87ad475b3c96d2464a1faad0 100644 (file)
--- a/net/hsr/hsr_slave.c
+++ b/net/hsr/hsr_slave.c
@@ -204,7 +204,6 @@ int hsr_add_port(struct hsr_priv *hsr, struct net_device *dev,
        }
 
        list_add_tail_rcu(&port->port_list, &hsr->ports);
-       synchronize_rcu();
 
        master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
        netdev_update_features(master->dev);