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>

1 files changed, 6 insertions, 1 deletions

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 17885a27281c..ee245c0659a6 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;
         }