tag	line	file	source code
UART_IER_THRI	271	drivers/char/serial.c	UART_IER_THRI | UART_IER_RDI);
UART_IER_THRI	776	drivers/char/serial.c	UART_IER_THRI | UART_IER_RDI);
UART_IER_THRI	961	drivers/char/serial.c	UART_IER_THRI | UART_IER_RDI);