--- arch/ia64/include/asm/thread_info.h.orig	2012-02-01 08:44:49.000000000 +0100
+++ arch/ia64/include/asm/thread_info.h.orig	2012-02-01 08:44:57.000000000 +0100
@@ -31,6 +31,9 @@ 
 	mm_segment_t addr_limit;	/* user-level address space limit */
 	int preempt_count;		/* 0=premptable, <0=BUG; will also serve as bh-counter */
 	struct restart_block restart_block;
+#ifdef CONFIG_PAX_MEMORY_STACKLEAK
+	unsigned long		lowest_stack;
+#endif
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
 	__u64 ac_stamp;
 	__u64 ac_leave;