tag	line	file	source code
UART_FCR_ENABLE_FIFO	95	include/linux/serial.h	#define UART_FCR_SETUP_CMD  (UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_14)
UART_FCR_ENABLE_FIFO	1174	kernel/chr_drv/serial.c	outb_p(UART_FCR_ENABLE_FIFO, UART_FCR + port);