SERIAL8250_PORT_FLAGS  108 drivers/tty/serial/8250/8250.h #define SERIAL8250_PORT(_base, _irq) SERIAL8250_PORT_FLAGS(_base, _irq, 0)
SERIAL8250_PORT_FLAGS   13 drivers/tty/serial/8250/8250_fourport.c 	SERIAL8250_PORT_FLAGS(_base, _irq, UPF_FOURPORT)