diff -urN /usr/src/linux-2.6.22.18-0.2/arch/i386/kernel/syscall_table.S kernelSrc/arch/i386/kernel/syscall_table.S
--- /usr/src/linux-2.6.22.18-0.2/arch/i386/kernel/syscall_table.S	2007-07-08 19:32:17.000000000 -0400
+++ kernelSrc/arch/i386/kernel/syscall_table.S	2008-09-19 21:11:36.000000000 -0400
@@ -323,3 +323,6 @@
 	.long sys_signalfd
 	.long sys_timerfd
 	.long sys_eventfd
+	.long sys_mailbox_send
+	.long sys_mailbox_rcv		/* 325 */
+	.long sys_mailbox_manage
diff -urN /usr/src/linux-2.6.22.18-0.2/include/asm-i386/unistd.h kernelSrc/include/asm-i386/unistd.h
--- /usr/src/linux-2.6.22.18-0.2/include/asm-i386/unistd.h	2007-07-08 19:32:17.000000000 -0400
+++ kernelSrc/include/asm-i386/unistd.h	2008-09-19 21:11:36.000000000 -0400
@@ -329,10 +329,13 @@
 #define __NR_signalfd		321
 #define __NR_timerfd		322
 #define __NR_eventfd		323
+#define __NR_mailbox_send	324
+#define __NR_mailbox_rcv	325
+#define __NR_mailbox_manage	326
 
 #ifdef __KERNEL__
 
-#define NR_syscalls 324
+#define NR_syscalls 327
 
 #define __ARCH_WANT_IPC_PARSE_VERSION
 #define __ARCH_WANT_OLD_READDIR
diff -urN /usr/src/linux-2.6.22.18-0.2/include/linux/sched.h kernelSrc/include/linux/sched.h
--- /usr/src/linux-2.6.22.18-0.2/include/linux/sched.h	2008-06-09 11:08:31.000000000 -0400
+++ kernelSrc/include/linux/sched.h	2008-09-19 21:11:36.000000000 -0400
@@ -822,6 +822,8 @@
 
 struct prio_array;
 
+struct cs3013_mailbox;
+
 struct task_struct {
 	volatile long state;	/* -1 unrunnable, 0 runnable, >0 stopped */
 	void *stack;
@@ -957,6 +959,8 @@
 	struct files_struct *files;
 /* namespaces */
 	struct nsproxy *nsproxy;
+/* mailbox */
+	struct cs3013_mailbox *mailbox;
 /* signal handlers */
 	struct signal_struct *signal;
 	struct sighand_struct *sighand;