Symbol: UART_CD
drivers/usb/serial/cypress_m8.c
1112
if (delta & UART_CD)
drivers/usb/serial/cypress_m8.c
1124
if (tty && !C_CLOCAL(tty) && !(priv->current_status & UART_CD)) {
drivers/usb/serial/cypress_m8.c
830
| ((status & UART_CD) ? TIOCM_CD : 0);