PROBLEM:  ('QAR 73648')    (Patch ID: TCR160-017)
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This patch fixes a problem where both nodes in a cluster will panic
at the same time with a simple_lock timeout panic.

PROBLEM:  (QAR 75850)    (Patch ID: TCR160-027)
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This patch fixes a kernel memory fault in rm_lock_update_retry().

PROBLEM:  (76634) (PATCH ID: TCR160-032)
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This patch fixes a problem which can cause the following panic:

panic (cpu 0): rm_update_single_lock_miss: time limit exceeded

A sample stack trace would look like:

  10 panic()
  11 rm_crash_node_mask()
  12 rm_panic()
  13 rm_update_single_lock_miss()
  14 rm_spinlk_update_request()
  15 rm_lrail_int_ctx()
  16 rm_lrail_int()
  17 Mchan_isr()
  18 intr_dispatch_no_post()
  19 _XentInt()
  20 rm_update_single_lock()
  21 delete_RM_spinlock_memory()