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authorThomas Gleixner <tglx@linutronix.de>2014-05-22 03:25:47 +0000
committerThomas Gleixner <tglx@linutronix.de>2014-06-21 22:05:30 +0200
commit8930ed80f970a90a795239e7415c9b0e6f964649 (patch)
tree10463885f150543faaaf621e7ff85bbe6a81c911 /kernel/locking/rtmutex-debug.c
parentc051b21f71d1ffdfd7ad406a1ef5ede5e5f974c5 (diff)
downloadlinux-8930ed80f970a90a795239e7415c9b0e6f964649.tar.bz2
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.c5
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);