From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Sat, 14 Feb 2009 15:59:04 +0000 (+0100)
Subject: lockstat: warn about disabled lock debugging
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=9833f8cb952b9aa3f98a71e7bef8820cee3261a0;p=linux-2.6-omap-h63xx.git

lockstat: warn about disabled lock debugging

Avoid confusion and clearly state lock debugging got disabled.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/kernel/lockdep_proc.c b/kernel/lockdep_proc.c
index b51064ce564..d7135aa2d2c 100644
--- a/kernel/lockdep_proc.c
+++ b/kernel/lockdep_proc.c
@@ -601,6 +601,10 @@ static void seq_stats(struct seq_file *m, struct lock_stat_data *data)
 static void seq_header(struct seq_file *m)
 {
 	seq_printf(m, "lock_stat version 0.3\n");
+
+	if (unlikely(!debug_locks))
+		seq_printf(m, "*WARNING* lock debugging disabled!! - possibly due to a lockdep warning\n");
+
 	seq_line(m, '-', 0, 40 + 1 + 10 * (14 + 1));
 	seq_printf(m, "%40s %14s %14s %14s %14s %14s %14s %14s %14s "
 			"%14s %14s\n",