tag	line	file	source code
UART_DLL	264	drivers/char/console.c	lo = serial_echo_inb(UART_DLL);
UART_DLL	273	drivers/char/console.c	serial_echo_outb(0x0c, UART_DLL);
UART_DLL	1246	drivers/char/serial.c	serial_outp(info, UART_DLL, quot & 0xff);  /* LS of divisor */