SB_MASK           816 drivers/tty/serial/pmac_zilog.c 	write_zsreg(uap, 4, X16CLK | SB_MASK);
SB_MASK          1066 drivers/tty/serial/pmac_zilog.c 	uap->curregs[4] &= ~(SB_MASK);
SB_MASK           889 drivers/tty/serial/zs.c 	zport->regs[4] &= ~(XCLK_MASK | SB_MASK | PAR_ENA | PAR_EVEN);