netisr: Make sure that netisr barrier's done is globally visible

diff --git a/sys/net/netisr.c b/sys/net/netisr.c
index 648b8c9..19f8c22 100644 (file)
--- a/sys/net/netisr.c
+++ b/sys/net/netisr.c
@@ -644,6 +644,7 @@ netisr_barrier_rem(struct netisr_barrier *br)
                        continue;
 
                msg->br_done = 1;
+               cpu_mfence();
                wakeup(&msg->br_done);
        }
 #endif