From 8930ed80f970a90a795239e7415c9b0e6f964649 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 22 May 2014 03:25:47 +0000 Subject: rtmutex: Cleanup deadlock detector debug logic The conditions under which deadlock detection is conducted are unclear and undocumented. Add constants instead of using 0/1 and provide a selection function which hides the additional debug dependency from the calling code. Add comments where needed. Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra Reviewed-by: Steven Rostedt Cc: Lai Jiangshan Link: http://lkml.kernel.org/r/20140522031949.947264874@linutronix.de Signed-off-by: Thomas Gleixner --- kernel/locking/rtmutex.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'kernel/locking/rtmutex.h') diff --git a/kernel/locking/rtmutex.h b/kernel/locking/rtmutex.h index f6a1f3c133b1..c4060584c407 100644 --- a/kernel/locking/rtmutex.h +++ b/kernel/locking/rtmutex.h @@ -22,10 +22,15 @@ #define debug_rt_mutex_init(m, n) do { } while (0) #define debug_rt_mutex_deadlock(d, a ,l) do { } while (0) #define debug_rt_mutex_print_deadlock(w) do { } while (0) -#define debug_rt_mutex_detect_deadlock(w,d) (d) #define debug_rt_mutex_reset_waiter(w) do { } while (0) static inline void rt_mutex_print_deadlock(struct rt_mutex_waiter *w) { WARN(1, "rtmutex deadlock detected\n"); } + +static inline bool debug_rt_mutex_detect_deadlock(struct rt_mutex_waiter *w, + enum rtmutex_chainwalk walk) +{ + return walk == RT_MUTEX_FULL_CHAINWALK; +} -- cgit v1.2.3