HelenOS sources

LF_USPACE         322 kernel/generic/src/log/log.c 		log(LF_USPACE, level, "%s", data);
LF_USPACE         132 kernel/generic/src/mm/backend_user.c 		log(LF_USPACE, LVL_FATAL,
LF_USPACE         160 uspace/srv/klog/klog.c 		if (item->data->facility == LF_USPACE) {