+/*
+ * Size of kernel stack for each process
+ */
+#ifndef __s390x__
+#ifndef __SMALL_STACK
+#define THREAD_ORDER 1
+#define ASYNC_ORDER 1
+#else
+#define THREAD_ORDER 0
+#define ASYNC_ORDER 0
+#endif
+#else /* __s390x__ */
+#ifndef __SMALL_STACK
+#define THREAD_ORDER 2
+#define ASYNC_ORDER 2
+#else
+#define THREAD_ORDER 1
+#define ASYNC_ORDER 1
+#endif
+#endif /* __s390x__ */
+
+#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
+#define ASYNC_SIZE (PAGE_SIZE << ASYNC_ORDER)
+