Index: kernel/arch/ppc32/include/mm/as.h
===================================================================
--- kernel/arch/ppc32/include/mm/as.h	(revision 6c3106f2799b7a9663b846f3973d4b21e90bfb2a)
+++ kernel/arch/ppc32/include/mm/as.h	(revision b6f3e7e89f35903bd2012ad022ef70b966d8b246)
@@ -38,10 +38,8 @@
 #define KERNEL_ADDRESS_SPACE_SHADOWED_ARCH  0
 
-#define KERNEL_ADDRESS_SPACE_START_ARCH  ((unsigned long) 0x80000000)
-#define KERNEL_ADDRESS_SPACE_END_ARCH    ((unsigned long) 0xffffffff)
-#define USER_ADDRESS_SPACE_START_ARCH    ((unsigned long) 0x00000000)
-#define USER_ADDRESS_SPACE_END_ARCH      ((unsigned long) 0x7fffffff)
-
-#define USTACK_ADDRESS_ARCH  (0x7fffffff - (PAGE_SIZE - 1))
+#define KERNEL_ADDRESS_SPACE_START_ARCH  UINT32_C(0x80000000)
+#define KERNEL_ADDRESS_SPACE_END_ARCH    UINT32_C(0xffffffff)
+#define USER_ADDRESS_SPACE_START_ARCH    UINT32_C(0x00000000)
+#define USER_ADDRESS_SPACE_END_ARCH      UINT32_C(0x7fffffff)
 
 typedef struct {