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2017-06-08rt_mutex: Add lockdep annotationsPeter Zijlstra1-1/+1
Now that (PI) futexes have their own private RT-mutex interface and implementation we can easily add lockdep annotations to the existing RT-mutex interface. Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Signed-off-by: Ingo Molnar <[email protected]>
2017-03-23futex: Remove rt_mutex_deadlock_account_*()Peter Zijlstra1-3/+0
These are unused and clutter up the code. Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2014-06-21rtmutex: Cleanup deadlock detector debug logicThomas Gleixner1-3/+4
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 <[email protected]> Cc: Peter Zijlstra <[email protected]> Reviewed-by: Steven Rostedt <[email protected]> Cc: Lai Jiangshan <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2014-06-07rtmutex: Handle deadlock detection smarterThomas Gleixner1-0/+5
Even in the case when deadlock detection is not requested by the caller, we can detect deadlocks. Right now the code stops the lock chain walk and keeps the waiter enqueued, even on itself. Silly not to yell when such a scenario is detected and to keep the waiter enqueued. Return -EDEADLK unconditionally and handle it at the call sites. The futex calls return -EDEADLK. The non futex ones dequeue the waiter, throw a warning and put the task into a schedule loop. Tagged for stable as it makes the code more robust. Signed-off-by: Thomas Gleixner <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Brad Mouring <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Cc: [email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2013-11-06locking: Move the rtmutex code to kernel/locking/Peter Zijlstra1-0/+33
Suggested-by: Ingo Molnar <[email protected]> Signed-off-by: Peter Zijlstra <[email protected]> Link: http://lkml.kernel.org/n/[email protected] [ Fixed build failure in kernel/rcu/tree_plugin.h. ] Signed-off-by: Ingo Molnar <[email protected]>