tag	line	file	source code
TTY_BH	71	drivers/char/pty.c	mark_bh(TTY_BH);
TTY_BH	406	drivers/char/serial.c	mark_bh(TTY_BH);
TTY_BH	1713	drivers/char/tty_io.c	bh_base[TTY_BH].routine = tty_bh_routine;