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Add a lock contention tracepoint in the queued spinlock slowpath. Also add the __lockfunc annotation so that in_lock_functions() works as expected. Signed-off-by: Nysal Jan K.A. <[email protected]> Reviewed-by: Shrikanth Hegde <[email protected]> Signed-off-by: Madhavan Srinivasan <[email protected]> Link: https://patch.msgid.link/[email protected]