CHB_EXT_STAT      237 drivers/tty/serial/ip22zilog.h #define CHB_EXT_STAT	0x02
CHB_EXT_STAT      332 drivers/tty/serial/pmac_zilog.h #define	CHB_EXT_STAT	0x02
CHB_EXT_STAT      241 drivers/tty/serial/sunzilog.h #define CHB_EXT_STAT	0x02