--- dahdi-linux-complete-2.7.0.1+2.7.0.1/linux/include/dahdi/kernel.h	2013-08-22 02:36:34.000000000 +0700
+++ dahdi-linux-complete/linux/include/dahdi/kernel.h	2013-11-07 22:02:47.929489662 +0700
@@ -1094,6 +1094,12 @@
 	int master;
 	unsigned char *msgbuf;
 	struct device *dev;
+	struct kfifo *rxfifo;
+	int rxfifo_size;        /* Not aligned size of FIFO, we actually use */
+	spinlock_t rxfifo_lock; /* See connent below (spin_lock_init) */
+	unsigned int slip;
+	unsigned int skip;
+	unsigned int rxnuerr;
 
 	struct list_head list;
 };