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: v3.8.12~61
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=228a8f062631a04bf383a80f30f4c9787c706ecd;p=thirdparty%2Fkernel%2Fstable.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 8e6e64b77609f..03dbc77b4bdfe 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -3714,7 +3714,8 @@ out:
 	if (fail)
 		return -EINVAL;
 
-	ftrace_graph_filter_enabled = 1;
+	ftrace_graph_filter_enabled = !!(*idx);
+
 	return 0;
 }