taglinefilesource code
dcd467drivers/char/serial.cinfo->icount.dcd++;
dcd2001drivers/char/serial.c((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
dcd2027drivers/char/serial.cput_user(cnow.dcd, &p_cuser->dcd);
dcd2755drivers/char/serial.cinfo->icount.rng = info->icount.dcd = 0;
dcd105include/linux/serial.hint cts, dsr, rng, dcd;
dcd127include/linux/serial.h__u32  cts, dsr, rng, dcd;