ftrace: Make ftrace_location() a nop on !DYNAMIC_FTRACE
When CONFIG_DYNAMIC_FTRACE is not set, ftrace_location() is not defined.
If a user (like kprobes) references this function, it will break
the compile when CONFIG_DYNAMIC_FTRACE is not set.
Add ftrace_location() as a nop (return 0) when DYNAMIC_FTRACE
is not defined.
Link: http://lkml.kernel.org/r/20120612225426.961092717@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 3e71112..a52f2f4 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -520,7 +520,7 @@
extern void ftrace_disable_daemon(void);
extern void ftrace_enable_daemon(void);
-#else
+#else /* CONFIG_DYNAMIC_FTRACE */
static inline int skip_trace(unsigned long ip) { return 0; }
static inline int ftrace_force_update(void) { return 0; }
static inline void ftrace_disable_daemon(void) { }
@@ -538,6 +538,10 @@
{
return 0;
}
+static inline unsigned long ftrace_location(unsigned long ip)
+{
+ return 0;
+}
/*
* Again users of functions that have ftrace_ops may not