From 9833f8cb952b9aa3f98a71e7bef8820cee3261a0 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Sat, 14 Feb 2009 16:59:04 +0100
Subject: [PATCH] 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>
---
kernel/lockdep_proc.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/kernel/lockdep_proc.c b/kernel/lockdep_proc.c
index b51064ce564a..d7135aa2d2c4 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",
--
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