taglinefilesource code
prev_port981drivers/char/serial.cinfo->prev_port = 0;
prev_port984drivers/char/serial.cinfo->next_port->prev_port = info;
prev_port1027drivers/char/serial.cinfo->next_port->prev_port = info->prev_port;
prev_port1028drivers/char/serial.cif (info->prev_port)
prev_port1029drivers/char/serial.cinfo->prev_port->next_port = info->next_port;
prev_port2472drivers/char/serial.cinfo->prev_port = 0;
prev_port119include/linux/serial.hstruct async_struct  *prev_port;