--- zzzz-none-000/linux-2.6.19.2/include/asm-powerpc/a.out.h	2007-01-10 19:10:37.000000000 +0000
+++ davinci-8020-5505/linux-2.6.19.2/include/asm-powerpc/a.out.h	2007-01-19 14:42:56.000000000 +0000
@@ -23,12 +23,12 @@
 #define STACK_TOP_USER64 TASK_SIZE_USER64
 #define STACK_TOP_USER32 TASK_SIZE_USER32
 
-#define STACK_TOP (test_thread_flag(TIF_32BIT) ? \
+#define __STACK_TOP (test_thread_flag(TIF_32BIT) ? \
 		   STACK_TOP_USER32 : STACK_TOP_USER64)
 
 #else /* __powerpc64__ */
 
-#define STACK_TOP TASK_SIZE
+#define __STACK_TOP TASK_SIZE
 
 #endif /* __powerpc64__ */
 #endif /* __KERNEL__ */