uart_prepare_sysrq_char 1694 drivers/tty/serial/8250/8250_port.c 	if (uart_prepare_sysrq_char(port, ch))
uart_prepare_sysrq_char  504 drivers/tty/serial/qcom_geni_serial.c 			sysrq = uart_prepare_sysrq_char(uport, buf[c]);