SLES10 Fixes (part 3):

- Configure check for mutex_lock_nested().  This function was introduced
  as part of the mutex validator in 2.6.18, but if it's unavailable then
  it's safe to fallback to a plain mutex_lock().

include/sys/types.h

@@ -17,6 +17,7 @@ extern "C" {
 #include <linux/smp_compat.h>
 #include <linux/workqueue_compat.h>
 #include <linux/kallsyms_compat.h>
+#include <linux/mutex_compat.h>
 
 #ifndef HAVE_UINTPTR_T
 typedef unsigned long			uintptr_t;