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| author | Thomas Gleixner <tglx@linutronix.de> | 2014-05-22 05:25:47 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2014-06-21 22:05:30 +0200 |
| commit | 8930ed80f970a90a795239e7415c9b0e6f964649 (patch) | |
| tree | 10463885f150543faaaf621e7ff85bbe6a81c911 /kernel/locking/rtmutex-debug.c | |
| parent | rtmutex: Confine deadlock logic to futex (diff) | |
| download | linux-8930ed80f970a90a795239e7415c9b0e6f964649.tar.xz linux-8930ed80f970a90a795239e7415c9b0e6f964649.zip | |
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 <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Link: http://lkml.kernel.org/r/20140522031949.947264874@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/locking/rtmutex-debug.c')
| -rw-r--r-- | kernel/locking/rtmutex-debug.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/locking/rtmutex-debug.c b/kernel/locking/rtmutex-debug.c index 49b2ed3dced8..62b6cee8ea7f 100644 --- a/kernel/locking/rtmutex-debug.c +++ b/kernel/locking/rtmutex-debug.c @@ -66,12 +66,13 @@ void rt_mutex_debug_task_free(struct task_struct *task) * the deadlock. We print when we return. act_waiter can be NULL in * case of a remove waiter operation. */ -void debug_rt_mutex_deadlock(int detect, struct rt_mutex_waiter *act_waiter, +void debug_rt_mutex_deadlock(enum rtmutex_chainwalk chwalk, + struct rt_mutex_waiter *act_waiter, struct rt_mutex *lock) { struct task_struct *task; - if (!debug_locks || detect || !act_waiter) + if (!debug_locks || chwalk == RT_MUTEX_FULL_CHAINWALK || !act_waiter) return; task = rt_mutex_owner(act_waiter->lock); |