diff -up qt-everywhere-opensource-src-4.6.2/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Platform.h.than qt-everywhere-opensource-src-4.6.2/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Platform.h
--- qt-everywhere-opensource-src-4.6.2/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Platform.h.than	2010-02-11 16:55:20.000000000 +0100
+++ qt-everywhere-opensource-src-4.6.2/src/3rdparty/javascriptcore/JavaScriptCore/wtf/Platform.h	2010-03-23 14:29:41.000000000 +0100
@@ -345,6 +345,11 @@
 #define WTF_PLATFORM_BIG_ENDIAN 1
 #endif
 
+/* PLATFORM(S390X) */
+#if defined(__s390x__) || defined(__s390x)
+#define WTF_PLATFORM_S390X 1
+#endif
+
 /* PLATFORM(IA64) */
 /* a.k.a. Itanium Processor Family, IPF */
 #if defined(__ia64) || defined(__ia64__) || defined(_M_IA64)
@@ -730,6 +735,8 @@
 /* Using JSVALUE32_64 causes padding/alignement issues for JITStubArg
 on MinGW. See https://bugs.webkit.org/show_bug.cgi?id=29268 */
 #define WTF_USE_JSVALUE32 1
+#elif PLATFORM(S390X)
+#define WTF_USE_JSVALUE64 1
 #else
 #define WTF_USE_JSVALUE32_64 1
 #endif
diff -up qt-everywhere-opensource-src-4.6.2/src/3rdparty/webkit/JavaScriptCore/wtf/Platform.h.than qt-everywhere-opensource-src-4.6.2/src/3rdparty/webkit/JavaScriptCore/wtf/Platform.h
--- qt-everywhere-opensource-src-4.6.2/src/3rdparty/webkit/JavaScriptCore/wtf/Platform.h.than	2010-02-11 16:55:17.000000000 +0100
+++ qt-everywhere-opensource-src-4.6.2/src/3rdparty/webkit/JavaScriptCore/wtf/Platform.h	2010-03-23 14:19:00.000000000 +0100
@@ -362,6 +362,11 @@
 #define WTF_PLATFORM_IA64 1
 #endif
 
+/* PLATFORM(S390X) */
+#if defined(__s390x__) || defined(__s390x)
+#define WTF_PLATFORM_S390X 1
+#endif
+
 /* PLATFORM(ALPHA) */
 #if defined(__alpha__)
 #define WTF_PLATFORM_ALPHA 1
@@ -729,7 +734,7 @@
 #endif
 
 #if !defined(WTF_USE_JSVALUE64) && !defined(WTF_USE_JSVALUE32) && !defined(WTF_USE_JSVALUE32_64)
-#if (PLATFORM(X86_64) && (PLATFORM(UNIX) || PLATFORM(WIN_OS))) || PLATFORM(IA64) || PLATFORM(ALPHA)
+#if (PLATFORM(X86_64) && (PLATFORM(UNIX) || PLATFORM(WIN_OS))) || PLATFORM(IA64) || PLATFORM(ALPHA) || PLATFORM(S390X)
 #define WTF_USE_JSVALUE64 1
 #elif PLATFORM(ARM) || PLATFORM(PPC64)
 #define WTF_USE_JSVALUE32 1