--- 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	2013-11-29 16:51:05.515563132 +0700
@@ -57,7 +57,8 @@
 #include <linux/sysfs.h>
 
 #include <linux/poll.h>
-
+#include <linux/kfifo.h>
+ 
 #define dahdi_pci_module pci_register_driver
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
@@ -1094,6 +1095,12 @@
 	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;
 };