Index: libpthread/sysdeps/generic/pt-mutex-trylock.c
===================================================================
RCS file: /cvsroot/hurd/hurd/libpthread/sysdeps/generic/pt-mutex-trylock.c,v
retrieving revision 1.7
diff -u -p -r1.7 pt-mutex-trylock.c
--- libpthread/sysdeps/generic/pt-mutex-trylock.c	12 Aug 2008 15:07:49 -0000	1.7
+++ libpthread/sysdeps/generic/pt-mutex-trylock.c	29 Apr 2009 08:20:19 -0000
@@ -34,6 +34,7 @@ __pthread_mutex_trylock (struct __pthrea
   if (__pthread_spin_trylock (&mutex->__held) == 0)
     /* Acquired the lock.  */
     {
+#if defined(ALWAYS_TRACK_MUTEX_OWNER)
 #ifndef NDEBUG
       self = _pthread_self ();
       if (self)
@@ -45,6 +46,7 @@ __pthread_mutex_trylock (struct __pthrea
 	  mutex->owner = _pthread_self ();
 	}
 #endif
+#endif
 
       if (mutex->attr)
 	switch (mutex->attr->mutex_type)