tag	line	file	source code
UART_FCR_ENABLE_FIFO	1212	drivers/char/serial.c	fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
UART_FCR_ENABLE_FIFO	1214	drivers/char/serial.c	fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8;
UART_FCR_ENABLE_FIFO	2607	drivers/char/serial.c	serial_outp(info, UART_FCR, UART_FCR_ENABLE_FIFO);