int irqhit=0;
 #endif
 
-#ifndef MIN
-#define MIN(a,b) ((a) < (b) ? (a) : (b))
-#endif
-
 static struct tty_driver *aurora_driver;
 static struct Aurora_board aurora_board[AURORA_NBOARD] = {
        {0,},
                                            &bp->r[chip]->r[CD180_TDR]);
                                port->COR2 &= ~COR2_ETC;
                        }
-                       count = MIN(port->break_length, 0xff);
+                       count = min(port->break_length, 0xff);
                        sbus_writeb(CD180_C_ESC,
                                    &bp->r[chip]->r[CD180_TDR]);
                        sbus_writeb(CD180_C_DELAY,
        save_flags(flags);
        while (1) {
                cli();
-               c = MIN(count, MIN(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
+               c = min(count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
                                   SERIAL_XMIT_SIZE - port->xmit_head));
                if (c <= 0) {
                        restore_flags(flags);