CHAIN_NONE
callchain->mode = CHAIN_NONE;
callchain_param.mode != CHAIN_NONE &&
callchain->mode = CHAIN_NONE;
callchain_param.mode != CHAIN_NONE &&
if (callchain->mode != CHAIN_NONE) {
case CHAIN_NONE:
callchain_param.mode = CHAIN_NONE;
case CHAIN_NONE:
case CHAIN_NONE: