diff --git a/drivers/include/linux/idr.h b/drivers/include/linux/idr.h
index 736ed2e6f6..d19941a735 100644
--- a/drivers/include/linux/idr.h
+++ b/drivers/include/linux/idr.h
@@ -13,6 +13,7 @@
 #define __IDR_H__
 
 #include <linux/types.h>
+#include <errno-base.h>
 #include <linux/bitops.h>
 //#include <linux/init.h>
 //#include <linux/rcupdate.h>
diff --git a/drivers/include/linux/mutex.h b/drivers/include/linux/mutex.h
index 7baa94dd2d..c301fe2332 100644
--- a/drivers/include/linux/mutex.h
+++ b/drivers/include/linux/mutex.h
@@ -56,6 +56,14 @@ struct mutex_waiter {
     int                *task;
 };
 
+
+#define __MUTEX_INITIALIZER(lockname) \
+                { .count = ATOMIC_INIT(1) \
+                , .wait_list = LIST_HEAD_INIT(lockname.wait_list) }
+
+#define DEFINE_MUTEX(mutexname) \
+        struct mutex mutexname = __MUTEX_INITIALIZER(mutexname)
+
 void __attribute__ ((fastcall)) __attribute__ ((dllimport))
      mutex_init(struct mutex*)__asm__("MutexInit");
 void __attribute__ ((fastcall)) __attribute__ ((dllimport))