From: Namhyung Kim <namhyung@kernel.org>
Date: Thu, 12 Jun 2014 16:23:51 +0000 (+0900)
Subject: tracing: Improve message of empty set_graph_notrace file
X-Git-Tag: v5.15~17515^2~39
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=280d1429b6a67432ead24fb68a504b4c90c3d96d;p=platform%2Fkernel%2Flinux-starfive.git

tracing: Improve message of empty set_graph_notrace file

When there's no entry in set_graph_notrace, it'll print below message

  #### all functions enabled ####

While this is technically correct, it's better to print like below:

  #### no functions disabled ####

Link: http://lkml.kernel.org/p/1402590233-22321-3-git-send-email-namhyung@kernel.org

Reported-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 17885a2..ee245c0 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -4089,7 +4089,12 @@ static int g_show(struct seq_file *m, void *v)
 		return 0;
 
 	if (ptr == (unsigned long *)1) {
-		seq_printf(m, "#### all functions enabled ####\n");
+		struct ftrace_graph_data *fgd = m->private;
+
+		if (fgd->table == ftrace_graph_funcs)
+			seq_printf(m, "#### all functions enabled ####\n");
+		else
+			seq_printf(m, "#### no functions disabled ####\n");
 		return 0;
 	}