diff --git a/drivers/staging/lustre/lnet/selftest/framework.c b/drivers/staging/lustre/lnet/selftest/framework.c
index 56b4ef4a5592356edc7b4d996f855866bd5ecc83..570914828b8c959cd0059c9bb06afc1e40d46c29 100644
--- a/drivers/staging/lustre/lnet/selftest/framework.c
+++ b/drivers/staging/lustre/lnet/selftest/framework.c
@@ -194,9 +194,9 @@ sfw_del_session_timer (void)
 	return EBUSY; /* racing with sfw_session_expired() */
 }
 
-/* called with sfw_data.fw_lock held */
 static void
 sfw_deactivate_session (void)
+	__must_hold(&sfw_data.fw_lock)
 {
 	sfw_session_t *sn = sfw_data.fw_session;
 	int	    nactive = 0;