ftrace: add stack tracing
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 90e0ba0..387bdcf 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -35,6 +35,16 @@
};
/*
+ * Stack-trace entry:
+ */
+
+#define FTRACE_STACK_ENTRIES 5
+
+struct stack_entry {
+ unsigned long caller[FTRACE_STACK_ENTRIES];
+};
+
+/*
* The trace entry - the most basic unit of tracing. This is what
* is printed in the end as a single line in the trace output, such as:
*
@@ -51,6 +61,7 @@
struct ftrace_entry fn;
struct ctx_switch_entry ctx;
struct special_entry special;
+ struct stack_entry stack;
};
};