tag	line	file	source code
callarg	364	include/linux/tty.h	void (*callback)(void * data), void * callarg);
callarg	1487	kernel/chr_drv/tty_io.c	void (*callback)(void * data), void * callarg)
callarg	1517	kernel/chr_drv/tty_io.c	tty->write_data_arg = callarg;