static struct riscom_board * IRQ_to_board[16];
static struct tty_driver *riscom_driver;
static unsigned char * tmp_buf;
-static DECLARE_MUTEX(tmp_buf_sem);
static unsigned long baud_table[] = {
0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,