diff -urN NVIDIA-Linux-x86-185.18.36-pkg1/usr/src/nv/nv-linux.h NVIDIA-Linux-x86-185.18.36-pkg1.new/usr/src/nv/nv-linux.h
--- nvidia-185.18.36/nv-linux.h	2009-08-15 10:58:45.000000000 +1000
+++ nvidia-185.18.36.new/nv-linux.h	2009-09-26 21:43:35.000000000 +1000
@@ -721,7 +721,7 @@
 #define nv_up(lock)                     up(&lock)
 
 #if defined(CONFIG_PREEMPT_RT)
-#define NV_INIT_MUTEX(mutex) init_MUTEX(mutex)
+#define NV_INIT_MUTEX(mutex) semaphore_init(mutex)
 #else
 #if !defined(__SEMAPHORE_INITIALIZER) && defined(__COMPAT_SEMAPHORE_INITIALIZER)
 #define __SEMAPHORE_INITIALIZER __COMPAT_SEMAPHORE_INITIALIZER