RxN_MASK           99 drivers/tty/serial/ip22zilog.h #define RxN_MASK	0xc0
RxN_MASK          188 drivers/tty/serial/pmac_zilog.h #define RxN_MASK	0xc0
RxN_MASK           91 drivers/tty/serial/sunzilog.h #define RxN_MASK	0xc0