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Keep track of lock owner name and replace lock_depth counter
with a per-cpu list of locks held by the cpu.
This allows us to print the actual locks held in case we hit
the (in)famous message about opal_pollers being run with a
lock held.
It also allows us to warn (and drop them) if locks are still
held when returning to the OS or completing a scheduled job.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
[stewart: fix unit tests]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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