diff -uNr NVIDIA-Linux-x86_64-190.53-pkg2-old/usr/src/nv/nv-linux.h NVIDIA-Linux-x86_64-190.53-pkg2/usr/src/nv/nv-linux.h
--- NVIDIA-Linux-x86_64-190.53-pkg2-old/usr/src/nv/nv-linux.h	2009-12-10 01:41:16.000000000 +0100
+++ NVIDIA-Linux-x86_64-190.53-pkg2/usr/src/nv/nv-linux.h	2010-03-11 11:29:05.649461963 +0100
@@ -199,6 +199,7 @@
 #endif
 
 #if defined(CONFIG_PREEMPT_RT)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
 typedef atomic_spinlock_t         nv_spinlock_t;
 #define NV_SPIN_LOCK_INIT(lock)   atomic_spin_lock_init(lock)
 #define NV_SPIN_LOCK_IRQ(lock)    atomic_spin_lock_irq(lock)
@@ -210,6 +211,18 @@
 #define NV_SPIN_UNLOCK(lock)      atomic_spin_unlock(lock)
 #define NV_SPIN_UNLOCK_WAIT(lock) atomic_spin_unlock_wait(lock)
 #else
+typedef raw_spinlock_t         nv_spinlock_t;
+#define NV_SPIN_LOCK_INIT(lock)   raw_spin_lock_init(lock)
+#define NV_SPIN_LOCK_IRQ(lock)    raw_spin_lock_irq(lock)
+#define NV_SPIN_UNLOCK_IRQ(lock)  raw_spin_unlock_irq(lock)
+#define NV_SPIN_LOCK_IRQSAVE(lock,flags) raw_spin_lock_irqsave(lock,flags)
+#define NV_SPIN_UNLOCK_IRQRESTORE(lock,flags) \
+  raw_spin_unlock_irqrestore(lock,flags)
+#define NV_SPIN_LOCK(lock)        raw_spin_lock(lock)
+#define NV_SPIN_UNLOCK(lock)      raw_spin_unlock(lock)
+#define NV_SPIN_UNLOCK_WAIT(lock) raw_spin_unlock_wait(lock)
+#endif
+#else
 typedef spinlock_t                nv_spinlock_t;
 #define NV_SPIN_LOCK_INIT(lock)   spin_lock_init(lock)
 #define NV_SPIN_LOCK_IRQ(lock)    spin_lock_irq(lock)