c25fb2aa39
We had a deadlock between: - free_process_memory_range (take lock) -> ihk_mc_pt_free_range -> ... -> remote_flush_tlb_array_cpumask -> "/* Wait for all cores */" and - obj_list_lookup() under fileobj_list_lock that disabled irqs and thus never ack'd the remote flush The rework is quite big but removes the need for the big lock, although devobj and shmobj needed a new smaller lock to be introduced - the new locks are used much more locally and should not cause problems. On the bright side, refcounting being moved to memobj level means we could remove refcounting implemented separately in all object types and simplifies code a bit. Change-Id: I6bc8438a98b1d8edddc91c4ac33c11b88e097ebb