taglinefilesource code
write_room2009drivers/char/console.cconsole_driver.write_room = con_write_room;
write_room2800drivers/char/cyclades.ccy_serial_driver.write_room = cy_write_room;
write_room4547drivers/char/istallion.cstli_serial.write_room = stli_writeroom;
write_room103drivers/char/n_tty.cspace = tty->driver.write_room(tty);
write_room247drivers/char/pty.cpty_driver.write_room = pty_write_room;
write_room2695drivers/char/scc.cscc_driver.write_room = scc_write_room;
write_room2711drivers/char/serial.cserial_driver.write_room = rs_write_room;
write_room3176drivers/char/stallion.cstl_serial.write_room = stl_writeroom;
write_room1154drivers/isdn/isdn_tty.cm->tty_modem.write_room = isdn_tty_write_room;
write_room130include/linux/tty_driver.hint  (*write_room)(struct tty_struct *tty);