tag	line	file	source code
UART_MSR_DCD	194	kernel/chr_drv/serial.c	if (((status & (UART_MSR_DCD|UART_MSR_DDCD)) == UART_MSR_DDCD)
UART_MSR_DCD	638	kernel/chr_drv/serial.c	| ((status  & UART_MSR_DCD) ? TIOCM_CAR : 0)