From c04c1bdd385af886422b89e1bf751b9a9d322ffc Mon Sep 17 00:00:00 2001
From: Richard Braun <rbraun@sceen.net>
Date: Thu, 31 Aug 2017 23:17:47 +0200
Subject: Make mutex debugging slightly more convenient

Define the macro controlling mutex debugging only if not already defined,
allowing users to pass it through CFLAGS.
---
 kern/mutex/mutex_adaptive.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'kern/mutex/mutex_adaptive.c')

diff --git a/kern/mutex/mutex_adaptive.c b/kern/mutex/mutex_adaptive.c
index ceec8f10..d5cab2f4 100644
--- a/kern/mutex/mutex_adaptive.c
+++ b/kern/mutex/mutex_adaptive.c
@@ -31,8 +31,9 @@
 #include <kern/thread.h>
 #include <machine/cpu.h>
 
-/* Set to 1 to enable debugging */
+#ifndef MUTEX_ADAPTIVE_DEBUG
 #define MUTEX_ADAPTIVE_DEBUG 0
+#endif /* MUTEX_ADAPTIVE_DEBUG */
 
 #if MUTEX_ADAPTIVE_DEBUG
 
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