[13/65] ftrace: Update filter when tracing enabled in set_ftrace_filter()

[Greg KH]

3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Steven Rostedt <srostedt@xxxxxxxxxx>

commit 072126f4529196f71a97960248bca54fd4554c2d upstream.

Currently, if set_ftrace_filter() is called when the ftrace_ops is
active, the function filters will not be updated. They will only be updated
when tracing is disabled and re-enabled.

Update the functions immediately during set_ftrace_filter().

Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 kernel/trace/ftrace.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2901,6 +2901,10 @@ ftrace_set_regex(struct ftrace_ops *ops,
 
 	mutex_lock(&ftrace_lock);
 	ret = ftrace_hash_move(ops, enable, orig_hash, hash);
+	if (!ret && ops->flags & FTRACE_OPS_FL_ENABLED
+	    && ftrace_enabled)
+		ftrace_run_update_code(FTRACE_ENABLE_CALLS);
+
 	mutex_unlock(&ftrace_lock);
 
 	mutex_unlock(&ftrace_regex_lock);


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