diff --git a/include/linux/stacktrace.h b/include/linux/stacktrace.h
index 50e2b01..1d2b084 100644
--- a/include/linux/stacktrace.h
+++ b/include/linux/stacktrace.h
@@ -6,15 +6,13 @@
 	unsigned int nr_entries, max_entries;
 	unsigned long *entries;
 	int skip;	/* input argument: How many entries to skip */
-	int all_contexts; /* input argument: if true do than one stack */
 };
 
-extern void save_stack_trace(struct stack_trace *trace,
-			     struct task_struct *task);
+extern void save_stack_trace(struct stack_trace *trace);
 
 extern void print_stack_trace(struct stack_trace *trace, int spaces);
 #else
-# define save_stack_trace(trace, task)			do { } while (0)
+# define save_stack_trace(trace)			do { } while (0)
 # define print_stack_trace(trace)			do { } while (0)
 #endif