taglinefilesource code
xmit_wait506drivers/char/serial.cwake_up_interruptible(&info->xmit_wait);
xmit_wait1514drivers/char/serial.cinterruptible_sleep_on(&info->xmit_wait);
xmit_wait2000drivers/char/serial.cinfo->xmit_wait = 0;
xmit_wait46include/linux/serial.hstruct wait_queue  *xmit_wait;