tag	line	file	source code
UART_IER_THRI	275	drivers/char/serial.c	UART_IER_THRI | UART_IER_RDI);
UART_IER_THRI	789	drivers/char/serial.c	UART_IER_THRI | UART_IER_RDI);
UART_IER_THRI	1037	drivers/char/serial.c	UART_IER_THRI | UART_IER_RDI);