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-rw-r--r--include/linux/rtmutex.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/rtmutex.h b/include/linux/rtmutex.h
index 281d8fd775e..8d522ffeda3 100644
--- a/include/linux/rtmutex.h
+++ b/include/linux/rtmutex.h
@@ -16,6 +16,8 @@
#include <linux/plist.h>
#include <linux/spinlock_types.h>
+extern int max_lock_depth; /* for sysctl */
+
/**
* The rt_mutex structure
*