tag	line	file	source code
UART_LCR_SBC	179	kernel/chr_drv/serial.c	serial_out(info, UART_LCR, serial_inp(info, UART_LCR) | UART_LCR_SBC);
UART_LCR_SBC	181	kernel/chr_drv/serial.c	serial_out(info, UART_LCR, serial_inp(info, UART_LCR) & ~UART_LCR_SBC);