ftrace: startup tester on dynamic tracing.
This patch adds a startup self test on dynamic code modification
and filters. The test filters on a specific function, makes sure that
no other function is traced, exectutes the function, then makes sure that
the function is traced.
This patch also fixes a slight bug with the ftrace selftest, where
tracer_enabled was not being set.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 953a36d..a842d96 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -55,6 +55,7 @@
};
int ftrace_force_update(void);
+void ftrace_set_filter(unsigned char *buf, int len, int reset);
/* defined in arch */
extern int ftrace_ip_converted(unsigned long ip);
@@ -70,6 +71,7 @@
extern void mcount_call(void);
#else
# define ftrace_force_update() ({ 0; })
+# define ftrace_set_filter(buf, len, reset) do { } while (0)
#endif
static inline void tracer_disable(void)