tag	line	file	source code
UART_SCR	1979	drivers/char/serial.c	scratch = serial_in(info, UART_SCR);
UART_SCR	1980	drivers/char/serial.c	serial_outp(info, UART_SCR, 0xa5);
UART_SCR	1981	drivers/char/serial.c	status1 = serial_in(info, UART_SCR);
UART_SCR	1982	drivers/char/serial.c	serial_outp(info, UART_SCR, 0x5a);
UART_SCR	1983	drivers/char/serial.c	status2 = serial_in(info, UART_SCR);
UART_SCR	1984	drivers/char/serial.c	serial_outp(info, UART_SCR, scratch);