--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/linux/stacktrace.h	Sun Jan 11 20:20:11 2009 +0100
@@ -0,0 +1,24 @@
+#ifndef __LINUX_STACKTRACE_H
+#define __LINUX_STACKTRACE_H
+
+struct task_struct;
+
+#ifdef CONFIG_STACKTRACE
+struct stack_trace {
+	unsigned int nr_entries, max_entries;
+	unsigned long *entries;
+	int skip;	/* input argument: How many entries to skip */
+};
+
+extern void save_stack_trace(struct stack_trace *trace);
+extern void save_stack_trace_tsk(struct task_struct *tsk,
+				struct stack_trace *trace);
+
+extern void print_stack_trace(struct stack_trace *trace, int spaces);
+#else
+# define save_stack_trace(trace)			do { } while (0)
+# define save_stack_trace_tsk(tsk, trace)		do { } while (0)
+# define print_stack_trace(trace, spaces)		do { } while (0)
+#endif
+
+#endif