null_ops          406 arch/um/drivers/chan_kern.c 	{ "null", &null_ops },
null_ops           30 arch/um/drivers/chan_user.h extern const struct chan_ops fd_ops, null_ops, port_ops, pts_ops, pty_ops,
null_ops           40 arch/um/drivers/null.c const struct chan_ops null_ops = {
null_ops          169 drivers/char/ttyprintk.c static const struct tty_port_operations null_ops = { };
null_ops          187 drivers/char/ttyprintk.c 	tpk_port.port.ops = &null_ops;