tag	line	file	source code
UART_MSR_CTS	293	kernel/chr_drv/serial.c	if (status & UART_MSR_CTS) {
UART_MSR_CTS	298	kernel/chr_drv/serial.c	info->tty->stopped = !(status & UART_MSR_CTS);
UART_MSR_CTS	920	kernel/chr_drv/serial.c	| ((status  & UART_MSR_CTS) ? TIOCM_CTS : 0);