From: Namhyung Kim <namhyung.kim@lge.com>
Date: Thu, 11 Apr 2013 07:01:38 +0000 (+0900)
Subject: tracing: Reset ftrace_graph_filter_enabled if count is zero
X-Git-Tag: v3.9.1~70
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a8bbee2c40d12f2d3ef0fd9e4b1e4a253f62e80d;p=karo-tx-linux.git

tracing: Reset ftrace_graph_filter_enabled if count is zero

commit 9f50afccfdc15d95d7331acddcb0f7703df089ae upstream.

The ftrace_graph_count can be decreased with a "!" pattern, so that
the enabled flag should be updated too.

Link: http://lkml.kernel.org/r/1365663698-2413-1-git-send-email-namhyung@kernel.org

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 5ca0c9417ebd..0a0e2a6da4fc 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -3736,7 +3736,8 @@ out:
 	if (fail)
 		return -EINVAL;
 
-	ftrace_graph_filter_enabled = 1;
+	ftrace_graph_filter_enabled = !!(*idx);
+
 	return 0;
 }