Index: uspace/lib/c/include/atomicdflt.h
===================================================================
--- uspace/lib/c/include/atomicdflt.h	(revision 0c2d9bb57bc590e00bd17e5f7cf0937be160cca7)
+++ uspace/lib/c/include/atomicdflt.h	(revision 7a98cef11fb8f3d08a03c92aae4d500d0a75a5d0)
@@ -60,6 +60,5 @@
 static inline bool cas(atomic_t *val, atomic_count_t ov, atomic_count_t nv)
 {
-// XXX	return __sync_bool_compare_and_swap(&val->count, ov, nv);
-	return false;
+	return __sync_bool_compare_and_swap(&val->count, ov, nv);
 }
 #endif