diff -up Python-3.2rc1/Python/ceval.c.s390-tsc Python-3.2rc1/Python/ceval.c
--- Python-3.2rc1/Python/ceval.c.s390-tsc	2011-02-04 05:11:27.585224435 -0500
+++ Python-3.2rc1/Python/ceval.c	2011-02-04 05:12:38.065223933 -0500
@@ -74,6 +74,13 @@ ppc_getcounter(uint64 *v)
                          "=a" (((int*)&(val))[0]), "=d" (((int*)&(val))[1]));
 
 
+#elif defined(__s390__)
+
+/* covers both s390 and s390x */
+
+#define READ_TIMESTAMP(val) \
+    __asm__ __volatile__("stck %0" : "=Q" (val) : : "cc")
+
 #else
 
 #error "Don't know how to implement timestamp counter for this architecture"