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locking/ww_mutex: Add kselftests for resolving ww_mutex cyclic deadlocks
Check that ww_mutexes can detect cyclic deadlocks (generalised ABBA cycles) and resolve them by lock reordering. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Maarten Lankhorst <dev@mblankhorst.nl> Cc: Nicolai Hähnle <nhaehnle@gmail.com> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20161201114711.28697-7-chris@chris-wilson.co.uk Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Jan 14, 2017
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