taglinefilesource code
delta_msr_wait472drivers/char/serial.cwake_up_interruptible(&info->delta_msr_wait);
delta_msr_wait1996drivers/char/serial.cinterruptible_sleep_on(&info->delta_msr_wait);
delta_msr_wait2756drivers/char/serial.cinfo->delta_msr_wait = 0;
delta_msr_wait169include/linux/serial.hstruct wait_queue  *delta_msr_wait;